Question

If tan x = 1, 0 < x < 90, then what is the value of 2 sin x cos x?

A) 1/2 B) 1 C) √3/2 D) √3

Answer 1

Answer:

arctan= 45°

sin45°= 1/√2= cos45°

so, 2sin45×cos45= 2×(1/√2×1/√2)= 2×1/2= 1

Answer is (B)