Question

$\frac{1-ta{n}^2(45^{\circ }-A)}{1+ta{n}^2(45^{\circ }-A)}$is equal to

• A. sin 2A
• B. cos 2A
• C. tan 2 A
• D. cot 2A.

Answer 1

Answer: (A)

Correct answer is (a) sin 2A