brittanyrod
brittanyrod
16-05-2018
Mathematics
contestada
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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