brittanyrod brittanyrod

16-05-2018
Mathematics

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csc x - sin x = cot x • cos x

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MANNYCARRILLO6 MANNYCARRILLO6

16-05-2018

1) expand csc and cotx identity

(1/sinx)-sinx = (cosx/sinx)*(cosx)

2) get common denominator on the left side

(1-sin^2x)/(sinx)= (cos^2x)/sinx

3) using cos^2x+sin^2x=1 you finished
cos^2(x)/sinx= cos^2(x)/sinx

hope that helps

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