Question

Evaluate :-
\[\tan[\frac{1}{2}\cos^{-1}\frac{3}{5}].\]

Answer 1

use half angle formula of tan

Answer 2

tan x=??

Answer 3

\[\tan x= \frac{2 \tan \frac{x}{2}}{1+\tan^2{\frac{x}{4}}}.\]

Answer 4

Why not draw a triangle? :-P

Answer 5

am I ryt?

Answer 6

no ... that's not correct.

Answer 7

then where is the mistake
?

Answer 8

you can use this :
\(\huge \arccos x = 2 \arctan \frac{\sqrt{1-x^2}}{1+x}\)

Answer 9

x/4

Answer 10

is it x/2

Answer 11

yes

Answer 12

is this correct?

Answer 13

i think it's not
Please help :)

Answer 14

only the componendo dividendo part is incorrect

Answer 15

it'll be -tan^2x/1 =-2/8

Answer 16

ya i also thought about that

Answer 17

thanx everyone fot their help.
i gt it:)