bantu dong yang bisa trigonometri

[tex]3. \: sin + cos = 1 \\ sin \alpha = + - \sqrt{1 - {cos}^{2} \alpha \ } \\ sin \alpha = + - \sqrt{ {sin}^{2} \alpha } \\ sin \alpha = + - sin \alpha \\ 4. \: \: sin + cos = 1 \\ cos \alpha = + - \sqrt{ 1 - {sin}^{2} \alpha } \\ \cos( \alpha ) = + - \sqrt{ {cos}^{2} \alpha } \\ \cos( \alpha ) = + - cos \alpha \\ 5.sec - tan = 1 \\ \tan( \alpha ) = + - \sqrt{ {sec}^{2} - 1 } \\ \tan( \alpha ) = + - \sqrt{ {tan}^{2} \alpha } \\ \tan( \alpha) = + - tan \alpha [/tex]