Question

If A and B are acute angles and sin A=cos B prove A+B=90°​

Answer 1

Step-by-step explanation:

assume A = 60° and B = 30°

.'. A + B = 90 °

Answer 2

Answer:

Step-by-step explanation:

sin A = cos B ⟹ sin A = sin (90 - B)  

                      = A = 90 - B

                      = A + B = 90