Question

If tan A = 1 then 2 sinA.COSA=
​

Answer 1

Step-by-step explanation:

Given that:-

tan A=1

=>tan A= tan 45°

=>A=45°

now , 2sinA cos A=

=>2 sin 45°×cos 45°

=>2 (1/√2)×(1/√2)

=>2/(√(2×2)

=>2/2

=>1

(or)

We know that

2Sin A cos A =sin2A

=>sin2A

=>Sin(2×45°)

=>Sin 90°

=>1

If tan A = 1 then 2 sinA.cos A=1