In the given expression, a and b are constants such that $\sin a^{\ci…

Question

Prompt

In the given expression, a and b are constants such that

sin a^{\circ} = 0.50

and

cos b^{\circ} = 0.99

, and

0 < b < 90

. What is the value of the given expression:

2 cos (90 - a)^{\circ} \cdot cos b^{\circ} + sin a^{\circ} \cdot sin (90 - b)^{\circ}