Question

If sinA = cosB, then the relationship between A and B may be given as
a) A + B = 180°
b) A - B = 180°
c) A + B = 90°
d) A - B = 90°​

Answer 1

C is the answer buddy ❤️

Answer 2

Answer:

sinA = cos B

=> sinA = sin(90 - B)

in comparing both sides

A = 90 - B

=> A + B = 90

so, the correct answer is option c