Question

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

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

Answer 1

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

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