Q21Long answer
If cos (θ + φ) = m cos (θ – φ), then prove that tan θ = cot φ . 1+ m cos (θ + φ) m [Hint: Express = and apply Componendo and Dividendo] cos (θ − φ) 1
If cos (θ + φ) = m cos (θ – φ), then prove that tan θ = cot φ . 1+ m cos (θ + φ) m [Hint: Express = and apply Componendo and Dividendo] cos (θ − φ) 1