Question

1+tan(2)thita=?
1)sin^thita 2)sec^thita
3)cosec^thita 4) cost^thita.​

Answer 1

SOME IDENTITIES RELATED TO TRIGONOMETRY ARE AS FOLLOWS:-

$1 + { \tan }^{2} \alpha = { \sec }^{2} \alpha$

${sin}^{2} \alpha + {cos}^{2} \alpha = 1$

$1 + {cot}^{2} \alpha = {cosec}^{2} \alpha$

$\frac{2 \: tan \alpha }{1 + {tan}^{2} \alpha } = sin \: 2 \alpha$

$\frac{1 - {tan}^{2} \alpha }{1 + {tan}^{2} \alpha } = tan( \frac{\pi}{4} - \alpha ) = tan(45 - \alpha )$