Упростить:
1) [tex]tg^{2}x-sin^{2}x-tg^{2}x*sin^{2}x[/tex]
2) [tex]\frac{cos(x)*tg(x)}{sin^{2}(x)} - ctg(x)*cos(x)[/tex]
1) [tex]tg^{2}x-sin^{2}x-tg^{2}x*sin^{2}x[/tex]
2) [tex]\frac{cos(x)*tg(x)}{sin^{2}(x)} - ctg(x)*cos(x)[/tex]
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Решение во вложении, надеюсь видно