Question

in a right angle abc right angles at b if tanA=1,
1 show that to 2 Sin A cos A = 1

Answer 1

Gn that

tan A = 1
This says that angle A=45°

Therefore,

2 sin A cos A = 2 sin 45 cos 45 =
$2 \times \frac{1}{ \sqrt{2} } \times \frac{1}{ \sqrt{2} } = 1$