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22 February, 13:32

Which of the following would be the best first step for verifying the identity below?

tan^ (2) y (csc^ (2) y - 1) = 1

A. tan^ (2) y (cot^ (2) y) = 1

B. tan^ (2) y (csc^ (2) y - 1) = sin^ (2) y + cos^ (2) y

C. (1/coy y) (csc^ (2) y-1) = sin^ (2) y + cos^ (2) y

D. tan^ (2) y ((1/sin y) - 1) = 1

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Answers (1)
  1. 22 February, 16:42
    0
    Alright, Let's try to change the equation.

    Then stay:

    Tg^2y. (Csc^2y-1) = 1

    This is easy to know, because:

    Sin^2y + Cos^2y = 1

    Then,

    Tg^2y. (Csc^2y-1) = Sin^2y + Cos^2y

    Then would be letter B)
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