Teaching AP DSC School Assistant 2025 Mock Test Series Mathematics Trigonometry Inverse Trigonometric Functions
\(\tan ^{-1}\left(\frac{a}{b}\right)-\tan ^{-1}\left(\frac{a-b}{a+b}\right)\) किसके बराबर है?
1
\(-\frac{\pi}{4}\)
2
\(\frac{\pi}{4}\)
3
\(\tan ^{-1}\left(\frac{a^2-b^2}{a^2+b^2}\right)\)
4
\(\tan ^{-1}\left(\frac{2 a b}{a^2+b^2}\right)\)