If cos 20º =m and cos 70º=n, then the value of m²+n² is :

  1. 3/2
  2. 1/√2
  3. ½
  4. 1
Anurag Mishra Professor Asked on 29th December 2015 in Maths.
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  • 1 Answer(s)

    Answer is 1 

    Monis Rasool Professor Answered on 29th December 2015.
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