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Asked Nov 6, 2019
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proof trigonometry identities

sec(x)+tan(x)=cos(x)/(1-sin(x))

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COSx The given equation is secx+ tan x= 1 sin x cOSx Let choose secx+ tan x to prove to prove the identity 1 -sinx sin x sin x 1 secx tan x = 1 tan x = secx COSx coSx COSx cOSx 1sinx cos x 1 sinx coSx (Multiply and divide by cosx) COs x COSX (1+sin x)cos x cos2 x

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