Trigonometric Functions And Equations

ধর \(S = [ - \pi ,{\pi \over 2}) - \left\{ { - {\pi \over 2}, - {\pi \over 4}, - {{3\pi } \over 4},{\pi \over 4}} \right\}\) তাহলে \(\left| {A = \left\{ {0 \in S:\tan \theta (1 + \sqrt 5 \tan (2\theta )) = \sqrt 5 - \tan (2\theta )} \right\}} \right.\) সেটটিতে মোট পদ সংখ্যা হল _____________.