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Mathematics, 17.10.2020 07:01 gthif5424

I need help proving a few trigonometric identities. $tanA = tanA * cscA^{2} + cot(-A)$

$csc^{2} \beta -csc^{2} \beta *sec^{2} \beta = -sec^{2} \beta$
$cscx+cotx=\frac{sinx}{1-cosx}$
$(secx+tanx)^{2} = \frac{cscx+1}{cscx-1}$

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I need help proving a few trigonometric identities.

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