Answered

prove the trigonometric identities. (1+sec x)(1-cos x)=tan x sin x

Sagot :

(1 + 1/cosx)(1-cosx) = tanxsinx
1 - cosx + 1/cosx -1 = (sinx/cosx)(sinx)
(-cos^(2) x + 1)/cosx = (sin^(2) x)/cosx
[tex] \frac{ sin^{2} x }{cosx} = \frac{ sin^{2} x }{cosx} [/tex]