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Could anyone please tell me how are those two expressions equivalent?! what are the identities used?

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- Thread starter cocopops12
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- #1

- 30

- 0

Could anyone please tell me how are those two expressions equivalent?! what are the identities used?

- #2

Office_Shredder

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[tex] \frac{1}{1-\sin z} = \frac{1+\sin z}{1+\sin z} \frac{1}{1-\sin z} = \frac{1+\sin z}{1-\sin^2 z} [/tex]

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