Question

sin²teta+cos²teta=1
sinteta=root1-cos²teta
costeta=root1-sin²teta
​

Answer 1

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

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

$\sin \alpha = \sqrt{1 - \cos ^{2} \alpha }$

The derivation is crt.｡◕‿◕｡

Answer 2

sin²teta+cos²teta=1

sinteta=root1-cos²teta

costeta=root1-sin²teta

GOOD!!!!