minta tolong jawab dong... butuh cepat nih

1) = (Sin x/ sin x tg x)-(tg x / sin x tg x)
= (1/ tg x) - (1/ sin x)
= (cos x/ sin x) - (1/ sin x)
= (cos x - 1) / sin x....terbukti

2) = 2- (1- cos²A) / cos A
= ( 1 + cos²A) / cos A
= (1/ cos A) + (cos²A/ cos A)
= sec A + cos A....terbukti