Question

The point (1, −1) is on the terminal side of angle θ, in standard position. What are the values of sine, cosine, and tangent of θ? Make sure to show all work.

Answer 1

@darkknight

Answer 2

whoops. I drew that wrong. HOld up

Answer 3

its okay :)

Answer 4

\[\sin=oppo/hypo.\]
\[\cos=adj./hypo.\]
\[\tan=oppo./adj.\]

Answer 5

sin= \[\frac{ \sqrt{2} }{ 2 }\]

Answer 6

is that correct?

Answer 7

or is that cos?

Answer 8

one is negative and one is positive, i know that

Answer 9

Actually all you have to do is that sin(theta) = y/r
cos(theta) = x/r
And tan(theta0 = y/x

Answer 10

r is \[\sqrt{x^2+y^2}\]

Answer 11

Where x is 1 and y is -1

Answer 12

so you'd use the pythagorean theorem right?

Answer 13

Yes, to find for tan(theta) = y/x

Answer 14

so confirm my answers

Answer 15

sin=\[\frac{ \sqrt{2} }{ 2 }\]
cos= \[-\frac{ \sqrt{2} }{ 2 }\]
tan= -1

Answer 16

correct?

Answer 17

No.

Answer 18

cos and sin have to switch?

Answer 19

sin is the y value. You flipped sin and cos

Answer 20

lol ok. i thought so

Answer 21

thanks! i have one more. can you help me?