Question

for what the value of theta,tan theta is not defined=?​

Answer 1

ANSWER:

answer is D

This is becoz

$\tan( \alpha ) = \frac{ \sin( \alpha ) }{ \cos( \alpha ) } \\ \sin(90 ) = 1 \\ \cos(90) = 0 \\ \tan( 90) = \frac{1}{0}$

which is not defined