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Trig. question (1 Viewer)

Thread starter BlueGas
Start date Sep 26, 2015

BlueGas

Well-Known Member

#1

I need someone to explain what happened in the second line, how did cosec^2x transform to cotx

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davidgoes4wce

Well-Known Member

#2

Its based on the trigonometric identiy

1+cot^2 x= cosec^2 x

Here is my working out:

P

psyc1011

#truth

#3

$\sin ^2 x + \cos^2 x = 1$

Divide both sides by sin^2 x,
$1+ \cot ^2 x = \cosec^2 x$

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