Question

if cos (90-A)=0, the sin (A+B)=
a)0
b)2
c)3
d) none of the above.​

Answer 1

Answer:

Step-by-step explanation:

given:

cos(90°-A) = 0

cos(90°-A) = cos(90°) [since cos90 is 0]

90°-A = 90°

90°-90° = A

A = 0.

since nothing has been said about B. Answer cannot be determined.