This question is from trigonometry topic – trigonometric ratios on complementary angles in which we have to show that [cos(90°-θ) sec(90°-θ) tan θ]/[cosec(90°-θ) sin(90°-θ) cot(90°-θ] tan(90°-θ)/cotθ = 2
RS Aggarwal, Class 10, chapter 12, question no 5(iv)
Hope it helps you.