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SSC CHSL 2018 · PYQ · Trigonometry · medium

It is given that √((1 – sin x)/(1 + sin x)) = a – tan x, then a is equal to:

  1. A.sec x✓ Correct
  2. B.sin x
  3. C.cos x
  4. D.cosec x

Explanation

√((1–sinx)/(1+sinx)) = (cosx)/(1+sinx) = sec x – tan x. Therefore a = sec x.
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