Question

If the numerical value of $\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ is $\frac{a}{b}$ then (where $a, b$ are coprime)

• A. $a+b=23$
• B. $a-b=11$
• C. $3 b = a +1$
• D. $2 a =3 b$

Answer 1

Answer: (A), (B), (C)

Correct answer is (a) $a+b=23$Correct answer is (b) $a-b=11$Correct answer is (c) $3 b = a +1$