Use a sum or difference formula to find the exact value of the following.
131
TT
sin
TT
cos
36
+ cos
1377
sin
18
18
36
:
口口
Х
3
?

Use a sum or difference formula to find the exact value of the following 131 TT sin TT cos 36 cos 1377 sin 18 18 36 口口 Х 3 class=