Question

If sin A = 3

4

, calculate cos A and tan A.​

Answer 1

$\sin\alpha = 3 \: \: \: \: \: \: \: \: \: \\ { \sin }^{2} \alpha = 9 \: \: \: \: \: \: \: \: \\ 1 - { \cos}^{2} \alpha = 9 \\ { \cos}^{2} \alpha = - 8 \: \: \: \: \: \\ cos \alpha = i \sqrt{8} \: \: \: \: \:$

U CAN EASILY SEE THIS IS AN IMAGINARY NO.