Ask a Doubt
Request a call back

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

JEE Class main Answered

cos 2A +cos 2B +cos 2C =-1-4cosA.cosB.cosC
Asked by ved.sorathiya4848 | 10 Aug, 2023, 09:26: PM
answered-by-expert Expert Answer
LHS equals cos 2 straight A plus cos 2 straight B plus cos 2 straight C equals left parenthesis 2 cos squared straight A minus 1 right parenthesis plus 2 cos left parenthesis straight B plus straight C right parenthesis cos left parenthesis straight B minus straight C right parenthesis equals negative 1 plus 2 cos squared straight A minus 2 cosAcos left parenthesis straight B minus straight C right parenthesis equals negative 1 plus 2 cosA left square bracket cosA minus cos left parenthesis straight B minus straight C right parenthesis right square bracket equals negative 1 plus 2 cosA left square bracket negative cos left parenthesis straight B plus straight C right parenthesis minus cos left parenthesis straight B minus straight C right parenthesis right square bracket equals negative 1 plus 2 cosA left curly bracket negative left square bracket cos left parenthesis straight B plus straight C right parenthesis plus cos left parenthesis straight B minus straight C right parenthesis right square bracket right curly bracket equals negative 1 minus 2 cosA left square bracket 2 cosBcosC right square bracket equals negative 1 minus 4 cosAcosBcosC equals RHS
Answered by Rashmi Khot | 11 Aug, 2023, 10:15: AM
Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Maths
Cos66+sin84
Asked by veerababukoppisettiveerababu3 | 17 Apr, 2024, 05:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
If p and q are roots of the equation 2cosx+3 sinx=1, then the value of tan(p+q) is
Asked by rahulkumarbsc73 | 09 Apr, 2024, 04:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
5cos2theeta-2sin2theeta=2
question image
Asked by srinivaskarri79 | 08 Apr, 2024, 09:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
the value of cos 28 degrees . cos 32 degrees minus sin 28 degrees into 32 degrees
Asked by prasanthimaddula7 | 15 Mar, 2024, 08:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
sin 78 degree-sin66degre-sin 42degree+sin6degree
Asked by amitras0003 | 26 Jan, 2024, 06:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
sin^4pi/8+cos4pi/8+sin^4 3pi/8+cos^4 3pi/8+sin^4 5pi/8+cos^4 5pi/8 + sin^4 7pi/8+cos^4 7pi/8
question image
Asked by chinnagallakumaraswamy03 | 23 Jan, 2024, 09:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
trigonometry
question image
Asked by anuragrr1222 | 29 Nov, 2023, 06:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
a centre of angle of radius 30 cm intercepts arc of 6 cm express the central angle of teta in radians and in degrees
Asked by lakshmiprasannasalapu | 10 Nov, 2023, 11:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
number of solutions of sinx + siny = sin(x+y), and |x| + |y|=1
Asked by sharma.phanindra | 26 Sep, 2023, 04:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Maths
1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B)= tanA/2cotB/2
Asked by telangesanskar | 10 Sep, 2023, 02:17: 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
×