Question

If A and B are complementary angles, then

Options

• sin A = sin B

• cos A = cos B

•  tan A = tan B

• sec A = cosec B

Answer 1

Given: A and are B are complementary angles 

Since `sec (90°-B)= cosec B`

therefore `A+B=90°`

⇒ `A=90°-B`

⇒ `sec  (90°-B)` 

⇒ `secA= cosec B`