if cosec θ +cot θ =k then prove that cos θ = k²-1/k²+1/10TH CLASS/MATHS/TRIGONOMETRY/EXERCISE 11.4@

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if cosec θ +cot θ =k then prove that cos θ = k²-1/k²+1
10TH CLASS
MATHEMATICS
EXERCISE 11.4
QUESTION NO 10
8 MARKS EASSY TYPE
  1. GS maths tutorial for academic and competitive
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