This question is from trigonometry topic – trigonometric identities in which we have to prove that 1/(1+sinθ) + 1/(1-sinθ) = 2sec²θ
RS Aggarwal, Class 10, chapter 13A, question no 6(i)
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Hope it helps you.