Question

anyone good at trigonometry???

Answer 1

ask the trigonometric problem and u will know it urself!!

Answer 2

?

Answer 3

what???

Answer 4

whats the prblm

Answer 5

Lol and Agree @Sriram

Answer 6

Prove that cos(2pi/15)*cos(4pi/15)*cos(8pi/15)*cos(16pi/15)=1/16

Answer 7

i plugged it into my calculator in radian mode, i mean i multiplied it out and i got 1/16.

Answer 8

i m sure thats not what Aravind wants

Answer 9

i just checked for this sum in SL Looney
and this sum is given after the part where sines and cosines of 36 have been derived.
so i think u need to convert these to the form 3pi/15 or its multiples and substitute values of sines and cosines of 36.