Home
Class 12
MATHS
cos (2("tan"^(-1)(1)/(5) + tan^(-1)5))=...

`cos (2("tan"^(-1)(1)/(5) + tan^(-1)5))`= ____

A

`(1)/(sqrt2)`

B

0

C

1

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

sin^(-1)(3/5)+tan^(-1)(1/7) is _____

sin(2"tan"^(-1)2/5) = ______

Show that cos(2"tan"^(-1)1/7)=sin(4"tan"^(-1)1/3) .

tan^(-1)(1)+tan^(-1)(2)+tan^(-1)(3) = _______

sec^(2)(tan^(-1)4)+cosec^(2)(cot^(-1)5) = ________

Prove that tan ^(-1)(1/5) + tan^(-1)(1/7) +tan^(-1)(1/3)+ tan ^(-1)(1/8) = pi/4

Find the value of sin(2"tan"^(-1)1/3)+cos("tan"^(-1)2sqrt2) .

Show that ( tan^(-1) 1 + tan^(-1) 2 + tan^(-1) 3) = pi

Find the value of 4tan^(-1)(1/5)-tan^(-1)(1/239) .