Question

Example 4 : In a right triangle ABC, right-angled at B,
if tan A= 1, then verify that
2 sin A cos A= 1.​

Answer 1

Step-by-step explanation:

tan A=1

A=45°.

Then,

2 sin A cos A=1

2 sin A (sin 90°-A)=1

2 sin²45°=1

tan A=1

Hence, proved....