Question

(18) ( cos (180-x)=-cos (x) )
(2) ( cos (175)=-cos (5) )
(x) ( cos 24+cos 5+cos 175+frac{1}{12} cos 204+cos 30 )
( =1 / 2 )

# Q.26 cos 24° + cos 5° + cos 175° + cos 204° + cos 300° = 1 (B) - (D) 1.

Solution

Instasolv

Solution