Home
Class 11
MATHS
Without using trignometric tables,prove ...

Without using trignometric tables,prove the following:`cos27^@+cos93^@+cos147^@=0`

Promotional Banner

Similar Questions

Explore conceptually related problems

Without using trignometric tables,prove the following: cos40^@+cos50^@+cos70^@+cos80^@=cos20^@+cos10^@

Without using trignometric tables,prove the following: sin40^@-cos70^@=sqrt3cos80^@

Without using trignometric tables,find cos15^@

Without using trignometric tables,find tan75^@

Without using trignometric tables,prove the following: sin10^@+sin50^@-sin80^@+sin140^@=sqrt2sin25^@

Without using trignometric tables,find sin105^@

Prove the following: cos20^@cos40^@cos60^@cos80^@=1/16

Prove the following: cos12+cos84^@+cos156^@+cos132^@=-1/2

Prove the following: cos^2 2x-cos^2 6x=sin4xsin8x

Prove the following: cos^2x+cos^2(x+120^@)+cos^2(x-120^@)=3/2