Home
Class 11
MATHS
Prove that cos^2 2x-cos^2 6x=sin4x sin8x...

Prove that `cos^2 2x-cos^2 6x=sin4x sin8x`

Promotional Banner

Topper's Solved these Questions

  • STRAIGHT LINES

    A N EXCEL PUBLICATION|Exercise QUESTION BANK|167 Videos

Similar Questions

Explore conceptually related problems

Show that (i) sin ^(2) 6 x-sin ^(2) dot(4) x=sin 2 x sin 10 x (ii) cos ^(2) 2 x-cos ^(2) 6 x=sin 4 x sin 8 x

Prove that (cos x-cos y)^(2)+(sin x-sin y)^(2)=4 sin ^(2)((x-y)/(2))

Prove that (cos 9 x-cos 5 x)/(sin 17 x-sin 3 x)=-(sin 2 x)/(cos 10 x)

Prove that (cos3x+cos7x-cos2x)/(sin 7x-sin3x-sin2x)=cot2x

Prove that (cos 7 x+cos 5 x)/(sin 7 x-sin 5 x)=cot x

Prove that (cos9x —cos5x)/(sin17x-sin3x)=(-sin2x)/(cos10x) .

Prove that sin 2 x+2 sin 4 x+sin 6 x=4 cos ^(2) x sin 4 x

prove that (cos 4x +cos 3x+cos2x)/(sin4x+sin3x+sin2x)=cot3x

Prove that (cos 4 x+cos 3 x+cos 2 x)/(sin 4 x+sin 3 x+sin 2 x)=cot 3 x .

Prove that cos 2 x cos (x/2)-cos 3 x cos ((9x)/2)=sin 5 x sin ((5 x)/2)