The minimum value of cos²x+cos²y-cos²z is

  1. -1
  2. 0
  3. 1
  4. 2
Anurag Mishra Professor Asked on 7th November 2015 in Maths.
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1 Answer(s)

Answer: (1) – 1 

Anurag Mishra Professor Answered on 19th May 2016.
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