Answer:
0.866
Step-by-step explanation:
By definition


We know that
. Inverse of sine is arcsin, so, angle
is computed as

Therefore, cosine of
is
cos (30°) = 0.866
Answer:
c = 30.56 to the nearest hundredth
Step-by-step explanation:
87 = 9/5 c + 32
87 - 32 = 9/5 c
9/5 c = 55
multiply both sides by 5/9:
c = 55*5 / 9
c = 30.56.