Question

Solve 0 10 years ago

Answer 1

\[\cos \theta=0\]

Answer 2

I got \[\cos \theta=1\]

Answer 3

-2 +(1/3)cos Θ = -5/3
(1/3) cos Θ = 1/3
cos Θ = 1

then you have to go to the unit circle and find Θ where the x-coordinate is 1.

Answer 4

Thanks

Answer 5

would it be 2pi? as a radical

Answer 6

it would be 0 and 2pi

Answer 7

it depends on your interval. I what you put above is right (both < signs) then there's no solution. If one of them is ≤, use that one

Answer 8

0 ≤theta<2pi

Answer 9

so it would be 0

Answer 10

yes 0

Answer 11

can i ask another question ? for another problem?

Answer 12

sure

Answer 13

sin(theta)=2

Answer 14

and how do you know where to look at the x or y axis for the unit circle?

Answer 15

based on which trig function you're working with.
(x, y) = (cos Θ, sin Θ)
so cos Θ is the x and sin Θ is the y.

Answer 16

and tan?

Answer 17

If you notice, the radius of the unit circle is 1. that's also the range of both cos Θ and sin Θ. Neither can be more than 1.
sin Θ = 2 has no solution

Answer 18

\[\tan\theta=\frac{ \sin \theta }{ \cos \theta }=\frac{ y }{ x }\]

Answer 19

Thank you thats everything

Answer 20

you're welcome