- #1

sapiental

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I'm having trouble understanding how my math book factored the following equation.

[(cos(t)sin(t) - (1 + sin(t))cos(t)) / (cos(t)cos(t) - (1 + sin(t))sin(t))]

to get

[(cos(t)(1+2sin(t))) / ((1 + sin(t)) (1 - 2sin(t)))]

I get the numerator but I don't understand what happened to the cosine in the denominator..

Any suggestions?

Thanks