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Mathematics
tan -1((1/4))+ tan -1((2/9)) equals to
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Q. $\tan ^{-1}\left(\frac{1}{4}\right)+\tan ^{-1}\left(\frac{2}{9}\right)$ equals to
Inverse Trigonometric Functions
A
$\frac{1}{2} \cos ^{-1}\left(\frac{3}{5}\right)$
B
$\frac{1}{2} \sin ^{-1}\left(\frac{3}{5}\right)$
C
$\frac{1}{2} \tan ^{-1}\left(\frac{3}{5}\right)$
D
$\tan ^{-1}\left(\frac{1}{2}\right)$
Solution:
Correct answer is (a) $\frac{1}{2} \cos ^{-1}\left(\frac{3}{5}\right)$Correct answer is (d) $\tan ^{-1}\left(\frac{1}{2}\right)$