Question

5. If sin A = 1/2 and cos B = 1/2, then A +
B = ? *
O 0
O 30°
O 60°
90°
O Other:​

Answer 1

Answer:

90°

Step-by-step explanation:

sin A = 1/2 sin 30°=1/2 cos B = 1/2 cos 60°=1/2 A+B = 30°+60°=90°

Answer 2

Solution:-

sinA = 1/2 = 30°

cosB = 1/2 = 60°

•°• A + B = 30° + 90°

A + B = 90°

Answer is 90°

• Explanation:-

In 30° - 60° - 90° triangle

sin (1/2) = 30° angle opposite to 30° ia 1/2 × hypotenuse only for sin.

cos (1/2) = 60° angle opposite to 60° is 1/2× hypotenuse. only for Cos.

You can refer table For it.