Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

Please solve the following questions:
Asked by manasd | 23 Jul, 2015, 11:36: AM
answered-by-expert Expert Answer
G i v e n space t h a t space A plus B plus C equals straight pi Consider space the space given space expression comma space sin 2 straight B plus sin 2 straight C minus sin 2 straight A colon We space know space that comma sinC plus sinD equals 2 sin open parentheses fraction numerator straight C plus straight D over denominator 2 end fraction close parentheses cos open parentheses fraction numerator straight C minus straight D over denominator 2 end fraction close parentheses Therefore comma sin 2 straight B plus sin 2 straight C minus sin 2 straight A equals 2 sin open parentheses fraction numerator 2 straight B plus 2 straight C over denominator 2 end fraction close parentheses cos open parentheses fraction numerator 2 straight B minus 2 straight C over denominator 2 end fraction close parentheses minus sin 2 straight A space space space space space space open square brackets because sin 2 straight A equals 2 sinAcosA close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sin open parentheses straight B plus straight C close parentheses cos open parentheses straight B minus straight C close parentheses minus 2 sinAcosA space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sin open parentheses straight pi minus straight A close parentheses cos open parentheses straight B minus straight C close parentheses minus 2 sinAcosA space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinAcos open parentheses straight B minus straight C close parentheses minus 2 sinAcosA space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinA open square brackets cos open parentheses straight B minus straight C close parentheses minus cosA close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinA open square brackets cos open parentheses straight B minus straight C close parentheses minus cosA close square brackets Similarly comma space we space know space that comma cosD minus cosC equals 2 sin fraction numerator straight C plus straight D over denominator 2 end fraction sin fraction numerator straight C minus straight D over denominator 2 end fraction Thus comma space sin 2 straight B plus sin 2 straight C minus sin 2 straight A equals 2 sinA open square brackets 2 sin fraction numerator straight A plus straight B minus straight C over denominator 2 end fraction sin fraction numerator straight A minus straight B plus straight C over denominator 2 end fraction close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinA open square brackets 2 sin fraction numerator straight pi minus straight C minus straight C over denominator 2 end fraction sin fraction numerator straight pi minus straight B minus straight B over denominator 2 end fraction close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinA open square brackets 2 sin fraction numerator straight pi minus 2 straight C over denominator 2 end fraction sin fraction numerator straight pi minus 2 straight B over denominator 2 end fraction close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 sinA open square brackets 2 cosCcosB close square brackets space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 4 sinAcosCcosB
Please post one question per query.
Answered by Vimala Ramamurthy | 23 Jul, 2015, 06:43: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Maths
ug
question image
Asked by nityaboragam | 11 Apr, 2024, 12:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
find the value of 2sin square 3pie by 4+3cos square 3pie by4-2tan square 3pie by 4
Asked by rajyothi64 | 05 Mar, 2024, 09:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Prove that:sin²0+sin²Π÷2+sin²π÷3+sinπ÷2=2
Asked by surekhashriwas01 | 12 Sep, 2023, 08:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
X tan^2 45 cos 60= sin 60 cot 30
Asked by vinay123chintu | 08 Jun, 2023, 08:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Cos2a+cas2b+cos2c+1+4cosa+cos2b+cos2c=0
Asked by soumyadas098h | 02 Nov, 2022, 08:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
cos^2 5@+ cos^2 10@+cos^2 15@...........+cos^2 180@
Asked by vermahiteshi243 | 30 Aug, 2021, 09:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
cos square (60-x) +cos square (60+x) belongs to
Asked by bandlapravalika4 | 25 Sep, 2020, 01:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Find the general solution of sin 2x = -1/2
Asked by Lalit Kariya | 12 Mar, 2020, 03:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Pls solve.
question image
Asked by pb_ckt | 11 Jun, 2019, 03:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
tan x =n tan y n belongs to R+ then maximum value of sec^2(x-y)=(n+1)^2/4n  
Asked by aahnik.mohanty | 29 May, 2019, 08:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×