Jawabanmu

2014-05-02T22:03:48+07:00
 tan A + cos A/1+sin A
=sinA/cos A+cosA/1+sinA (samakan penyebut)
=(sinA(1+sinA)+cosA.cosA)/(cosA(1+sinA))
=sinA+sin^2A+cos^2A/
(cosA(1+sinA))
=(sinA+1)/(cosA(1+sinA))
=1/cosA=secA

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