Home
Class 11
MATHS
If A is not an integral multipe of pi , ...

If A is not an integral multipe of `pi` , prove that `cosAcos2Acos4Acos8A=(sin16A)/(16sinA)`

Promotional Banner

Topper's Solved these Questions

  • MATHEMATICS -I(A) MODEL PAPER 5

    VGS PUBLICATION-BRILLIANT|Exercise Section-C|7 Videos

  • MATHEMATICS -I(A) MODEL PAPER 5

    VGS PUBLICATION-BRILLIANT|Exercise Section-C|7 Videos

  • MATHEMATICS -I(A) MODEL PAPER 4

    VGS PUBLICATION-BRILLIANT|Exercise Section-C|7 Videos

  • MATHEMATICS -I(B) MODEL PAPER -9

    VGS PUBLICATION-BRILLIANT|Exercise SECTION-C|7 Videos

Similar Questions

Explore conceptually related problems

If A is not an integral multiple of (pi) , prove that cos A cos 2A cos 4A cos 8A =(sin 16A)/(16 sin A) Hence deduce that cos. (2pi)/(15). Cos. (4pi)/(15) .cos. (8pi)/(18). Cos. (16pi)/(15)=(1)/(16)

IF theta is not an integral muliple of pi/2 , prove that tantheta+2tan2theta+4tan4theta+8cot8theta=cottheta

If theta is not an integral multiple of (pi)/(2) , prove that tan theta + 2 tan 2 theta +4 tan 4 theta +8 cot 8 theta = cot theta

16 sin x cosx cos 2x cos 4x cos 8x in

If A, B, C are angles of a triangle , prove that sin 2A+sin 2B-sin 2C=4cos Acos B sin C

For A in R , prove that cos""pi/9.cos""(2pi)/9.cos""(3pi)/9.cos""(4pi)/9=1/16

For A in R , prove that sin20^(@)sin40^(@)sin60^(@)sin80^(@)=3/16

If A, B, C are the angles in a triangle then prove that sin .(A)/(2)+ sin . (B)/(2)+ sin .(C)/(2) =1 +4 sin((pi-A)/(4)) sin ((pi-B)/(4)) sin((pi-C)/(4))

Prove that cos""(2pi)/7.cos""(4pi)/7.cos""(8pi)/7=1/8 .

Prove that cos^(2)76^(@)+cos^(2)16^(@)-cos76^(@)cos16^(@)=(3)/(4)