Ask a Doubt
Request a call back

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

ICSE Class 9 Answered

Plese solve this sum for meI f space sin theta equals 2 minus space cos theta space a n d space theta greater-than or slanted equal to 0 space f i n d space sin theta
Asked by parimalmullick | 03 Nov, 2015, 07:28: PM
answered-by-expert Expert Answer
G i v e n space t h a t space sin theta equals 2 minus cos theta space a n d space theta greater or equal than 0 rightwards double arrow s i n theta plus cos theta equals 2 S q u a r i n g space b o t h space t h e space s i d e s comma space w e space h a v e comma open parentheses sin theta plus cos theta close parentheses squared equals 2 squared rightwards double arrow sin squared theta plus cos squared theta plus 2 sin theta cos theta equals 4 rightwards double arrow 1 plus 2 s i n theta c o s theta equals 4 rightwards double arrow 2 s i n theta open parentheses 2 minus s i n theta close parentheses equals 4 minus 1 space space space space space space open square brackets because cos theta equals 2 minus sin theta close square brackets rightwards double arrow 2 s i n theta open parentheses 2 minus s i n theta close parentheses equals 3 rightwards double arrow 4 s i n theta minus 2 sin squared theta equals 3 rightwards double arrow 2 s i n squared theta minus 4 s i n theta plus 3 equals 0 S o l v i n g space t h e space q u a d r a t i c comma space w e space h a v e comma sin theta equals fraction numerator negative open parentheses negative 4 close parentheses plus-or-minus square root of open parentheses negative 4 close parentheses squared minus 4 cross times 2 cross times 3 end root over denominator 2 cross times 2 end fraction rightwards double arrow s i n theta equals fraction numerator 4 plus-or-minus square root of 16 minus 24 end root over denominator 4 end fraction rightwards double arrow s i n theta equals fraction numerator 4 plus-or-minus square root of negative 8 end root over denominator 4 end fraction T h u s space t h e space s o l u t i o n space i s space n o t space r e a l. P l e a s e space c h e c k space y o u r space q u e s t i o n.
Answered by Vimala Ramamurthy | 04 Nov, 2015, 10:42: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 9 - Maths
cos18-sin18
Asked by bhuvanajajimoggala0 | 20 Dec, 2023, 06:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
value of 4/cos⁴A-sin⁴A+1
Asked by bhuvanajajimoggala0 | 16 Dec, 2023, 05:45: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
if CosA+secA= 2, find the value of cosA2 and secA2
Asked by priyapal1106 | 11 Feb, 2021, 08:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Sin A + cosec A = 2
Asked by anufancy1 | 16 Oct, 2020, 10:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
If cos A + sec A = 2, find value of cos2 A + sec2 A. 
Asked by natashagupta50.9spicertl | 30 Sep, 2020, 03:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
is zero degree is less than and less than 90 degree and zero satisfies 2 sin square theta minus 1 equals to zero find the value of cos theta + cos 2 theta
Asked by maheshranjan253 | 18 Aug, 2020, 07:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Solve it
question image
Asked by padmalochandey3 | 03 Jul, 2020, 07:23: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
if 3cos A = 4sinA, find 4cos²A-3sin²A+2
question image
Asked by ambikaradhika582 | 22 Jun, 2020, 03:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
tan30.sec45+tan60.sec30
Asked by shubhaarya25 | 17 May, 2020, 04:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
CosA=0.5 /cosB=1/√2 find value of TanA-TanB /1+TanATanB
question image
Asked by ashwinipandey7355 | 03 Dec, 2019, 11:01: 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
×