Find Out the value of cos² β

If cos α/sin β = n and cos α /cos β=m, then the value of cos² β

  1. 0
  2.      n²   /m2 + n2
  3.       m²  /m2 + n2
  4.        1/m2 + n2
Monis Rasool Professor Asked on 28th August 2015 in Maths.
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1 Answer(s)

Answer: (2) n^2/(m^2 + n^2) 

Anurag Mishra Professor Answered on 11th April 2016.
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