`Sin (45^@ + A) sin (45^@ - A) = 1/2cos 2A`.

sin (45 ^ (@) + A) sin (45 ^ (@) - A) = (1) / (2) cos2A

cos (45 ^ (@) - A) cos (45 ^ (@) - B) -sin (45 ^ (@) - A) sin (45 ^ (@) - B) = sin (A + B)

Prove that: sin(45^(@)-A)=1/2cos2A

cos 45^(@)-sin 45^(@)=?

(cos (45 ^ (@) + A) -cos (45 ^ (@) - A)) / (sin (120 ^ (@) + A) -sin (120 ^ (@) - A)) =

What is the value of [2 sin (45 +theta) sin (45 -theta)]//cos 2 theta ? [2 sin (45 +theta) sin (45 -theta)]//cos 2 theta का मान क्या है?

The value of sin (45° + θ) – cos (45° – θ) is (A) 2 cos θ (B) 2 sin θ (C) 1 (D) 0

The value of (cos 0^(@) + sin 45^(@) + sin 30^(@)) (sin 90^(@) - cos 45^(@) + cos 60^(@)) is

If A = (sin 45^(@) - sin 30^(@))/(cos 45^(@) + cos 60^(@)) and B = (sec 45^(@) - tan 45^(@))/(cosec 45^(@) + cot 45^(@)) , then which one of the following is correct ?