Home
Class 12
MATHS
cos\ pi/5+cos\ (3pi)/5=...

`cos\ pi/5+cos\ (3pi)/5=`

Promotional Banner

Similar Questions

Explore conceptually related problems

Prove that: sin((3pi)/8-5)cos( pi/8+5)+cos((3pi)/8-5)sin(pi/8+5)=1

The value of cos(pi)/(5)cos.2(pi)/(5)cos4(pi)/(5)cos8(pi)/(5)=

cos(pi/5)cos((2pi)/5)cos((4pi)/5)cos((8pi)/5)=

Prove that: cos(pi/5)cos((2pi)/5)cos((4pi)/5)cos((8pi)/5)=(-1)/16

cos(pi/14) + cos ((3pi)/14) + cos((5pi)/14) =

cospi/5+cos(2pi)/5+cos(6pi)/5+cos(7pi)/5=0

Prove that: 2cos pi/(13) cos (9pi)/(13) +cos (3pi)/(13) +cos (5pi)/(13)=0

Prove that: 2cos pi/(13) cos (9pi)/(13) +cos (3pi)/(13) +cos (5pi)/(13)=0