Tolong yaa,pakai caranya,makasiiii

Tolong yaa,pakai caranya,makasiiii

$begin{align}text{a}) ::::::::::::::::::::: (csc A+cot A)(1-cos A) &= sin A \ left(frac{1}{sin A}+frac{cos A}{sin A}right)(1-cos A) &= sin A \ frac{1}{sin A} -frac{cos A}{sin A} +frac{cos A}{sin A} -frac{cos Acdotcos A}{sin A} &= sin A \ frac{1}{sin A} left(1-cancel{cos A}+cancel{cos A}-cos^2 Aright) &= sin A \ frac{1}{sin A}left(1-cos^2 Aright) &= sin A \ frac{1-cos^2 A}{sin A} &= sin A \ frac{sin^2 A}{sin A} &= sin A \ frac{sin Acdotcancel{sin A}}{cancel{sin A}} &= sin A \ text{Terbukti}implies ::::::::::::::::sin A &= sin A end{align}$

$begin{align}text{b}) ::::::::::::::::::::: frac{1+secbeta}{tanbeta+sinbeta} &= cscbeta \ frac{1+frac{1}{cosbeta}}{frac{sinbeta}{cosbeta}+sinbeta} &= cscbeta \ frac{1+frac{1}{cosbeta}}{frac{sinbeta}{cosbeta}+sinbeta}cdotfrac{cosbeta}{cosbeta} &= cscbeta \ frac{cosbeta+1}{sinbeta+sinbetacosbeta} &= cscbeta \ frac{cancel{cosbeta+1}}{sinbeta(cancel{1+cosbeta})} &= cscbeta \ frac{1}{sinbeta} &= cscbeta \ text{Terbukti}implies :::::cscbeta &= cscbeta end{align}$

$begin{align}text{c}) ::::::::::::::::::::: 1-frac{cos^2A}{1+sin A} &= sin A \ 1-frac{1-sin^2A}{1+sin A } &= sin A \ 1-frac{(1-sin A)(cancel{1+sin A})}{cancel{1+sin A}} &= sin A \ 1-(1-sin A) &= sin A \ 1-1+sin A &= sin A \ text{Terbukti}implies :::::sin A &= sin A end{align}$