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28 October, 17:10

What is the expression (cscx+cotx) ^2 the same as?

a) 1 + 2csc^2x

b) csc^2x + 2cscx + cot^2x

c) 1 + 2cot^2x + 2cscx cotx

d) csc^2x + cot^2x

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Answers (1)
  1. 28 October, 18:49
    0
    c) 1 + 2cot^2x + 2cscx cotx

    because cosc^2x=1+cot^2x
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