Question

What are the sine, cosine, and tangent of Θ = 3 pi over 4 radians?

sin Θ = square root 2 over 2; cos Θ = negative square root 2 over 2; tan Θ = -1

sin Θ = negative square root 2 over 2; cos Θ = square root 2 over 2; tan Θ = 1

sin Θ = square root 2 over 2; cos Θ = negative square root 2 over 2; tan Θ = 1

sin Θ = negative square root 2 over 2; cos Θ = square root 2 over 2; tan Θ = -1

Answer 1

have you covered the 45-45-90 rule yet?

Answer 2

i think so

Answer 3

well, let's see the unitary circle then

Answer 4

45

Answer 5

hmmm if hypotenuse is 1, and hypotenuse is the longest side
how could "x" be longer by 45 times?

Answer 6

and yes, the reference angle is 45 degrees
but you're asked for the trig functions of it

Answer 7

oh idk

Answer 8

remeber pi/2 is 90 degrees and your past that

Answer 9

http://ct12345.weebly.com/uploads/9/6/0/9/9609821/805845_orig.gif <--- notice the ratios on the 45-45-90 rule