Question

The problem refers to right triangle ABC with C = 90°. Use a calculator to find sin(A), cos(A), sin(B), and cos(B). Round each answer to the nearest hundredth. Assume b = 1.49, c = 2.07.

I found cos(A) and and sin(B) as both 0.72. For sin(A) and cos(B), my answers came out to be 0.70. As I look at the back of the book, it says that my sin(A) and cos(B) are incorrect. Help please? Thank you!