Question

Please help! Having trouble with this Precalc/Trig problem :/ Click attached

Answer 1

factor it... treat it as a quadratic...

Answer 2

Lets just change the name of tanx.. lets call z.

Answer 3

Factor out tan(x) first..

Answer 4

\[z^2 - z = 0 \] can you do that one?

Answer 5

\[\tan(x)(\tan(x) - 1) = 0\]

\[\tan(x) = 0\]
And:
\[\tan(x) - 1 = 0\]

Now try to find x..

Answer 6

1/4?

Answer 7

?

Answer 8

x = arc tan(1)
x=??

Answer 9

pi/4

Answer 10

http://upload.wikimedia.org/wikipedia/commons/4/4c/Unit_circle_angles_color.svg

Answer 11

tan(x) = 0

Can you tell for what value of x tan(x) is 0 ??

Answer 12

:/ uhhh

Answer 13

huh...

Answer 14

tan(x) = 0

can't you find x from it??

\[x = \tan^{-1}(0)\]

Answer 15

I replied to helpingtutors, pi/4?

Answer 16

That is not right for this..

Answer 17

That is right for \(tan(x) = 1\)

Answer 18

Can you find the value of \(tan^{-1}(0)\) ??

Answer 19

0

Answer 20

Yes..

Answer 21

One value you are getting 0 and other pi/4

What could be the answer can you tell ??

Answer 22

By looking at the answer choices..

Answer 23

C.? Or can you reduce?

Answer 24

reduce?

Answer 25

Are you sure with C or not ??

Tell me this thing..

Answer 26

Yes

Answer 27

Then you are right..

Answer 28

tangent equals zero in two points in the unit circle

Answer 29

C. Thank you all for your help :) I appreciate it very much

Answer 30

Wait..

Answer 31

:/

Answer 32

Go with @nickhouraney

Answer 33

So not c.?

Answer 34

No..
My mistake there...

Answer 35

whats points in the unit circle will tangent equal zero

Answer 36

if you answer this ^ you will have your answer

Answer 37

Basically :

\(tan(x) = 0\)

\[\implies x = n \pi, n \in \mathbb{Z}\]

Answer 38

n is integer here..

Put n = 0 and 1 to find your answer..

Answer 39

b.?

Answer 40

Yep..

Answer 41

Ahhhh I see. Thanks guys

Answer 42

Welcome dear..