Express each of the following in terms of T-ratios of angles lying between 0° and 45°:
cosec 54° + sin 72°

Express each of the following in terms of T-ratios of angles lying between 0° and 45°:
cot 65° + tan 49°

Express each of the following in terms of T-ratios of angles lying between 0° and 45°:
sec 78° + cosec 56°

If A, B and C are the angles of a ABC, prove that

If cos 2 θ = sin 4 θ, where 2θ and 4θ are acute angles, find the value of θ .