Question

find the value of 2sin15.cos45

Answer 1

ANSWER:-

2sin45 × cos45 = 1

Answer 2

first of all sin (45 -30)

sin 45 cos 30 - cos 45 sin 30 according to the identity

1/√2*√3/2-1/√2*1/2

√3/2√2-1/2√2=√3-1/2√2

now 2 into sin 45 into cos 45

2*√3-1/2√2*1/√2=√3-1/2