One of the most important and conceptual question from trigonometry, topic – trigonometric identities in which we have given that m = (cosθ-sinθ) and also  n = (cosθ+sinθ) and we have to prove  that √m/n + √n/m = 2/√(1-tan²θ)

Kindly give me a detailed solution of this question

RS Aggarwal, Class 10, chapter 13B, question no 15