Question

If the cos 90° = 0, then the sin 0° = _____. 0, because the angles are complementary , because the angles are complementary , because the angles are supplementary 1, because the angles are complementary

Answer 1

0 and 90 are compllementary
the answer is 0 because the angles are complementary

Answer 2

Option 1 is correct.

Explanation:

Given If the cos 90° = 0, then the value of sin 0° is

As cos Ф=sin(90-Ф)

because angles are complementary i.e Ф+(90-Ф)=90

∴ cos 90° = sin(90-90)°=sin 0°

cos 90°=0 gives sin 0°=0 as cos 90°=sin 0°

because the angles are complementary i.e 90°+0°=90°

Hence, option 1 is correct