Question

Find exact value in radians:
inverse tan of [tan(2pi/5)]?

Answer 1

\[\tan^{-1} (\tan 2\pi/5)\]

Answer 2

yeah

Answer 3

wait i am solving.......

Answer 4

is 72 degrees the answer?

Answer 5

?

Answer 6

no has to be in radians

Answer 7

i dont have the answer though

Answer 8

ok

Answer 9

its so simple the answer is 2pi/5

Answer 10

got it?

Answer 11

im trying to come up with that, how do you end up with 2pi/5?

Answer 12

actually \[\tan^{-1} (\tan (\theta))=\theta \]
provided \[\theta lies \between -\pi/2 \to \pi/2\]

Answer 13

provided theta lies between -pi/2 to pi/2

Answer 14

oh wow haha i cant believe i forgot that property

Answer 15

are you making fun of me or reminding yourself?

Answer 16

no not at all im laughing at myself cause youre right it was so simple!

Answer 17

ok any other help required?

Answer 18

Nope that will be all, thanks!