Question

If A = 60° and B = 30°, verify that : sin (A + B) = sin A cos B + cos A sin B

Prove that : tan θ/(1 − cot θ) + cot θ/(1 − tan θ) = 1 + sec θ cosec θ

If x(2 tan 30°/(1 + tan² 30°)) = y(2 tan 30°/(1 – tan² 30°)), then x : y =

If a sec θ + b tan θ = m and b sec θ + a tan θ = n, prove that a² + n² = b² + m²