1.) Let (8, -6) be a point on the terminal side of an angle θ in standard position. The radius r is:

Question

Let (8, -6) be a point on the terminal side of an angle in standard position.  The radius r is: 

Now, evaluate the three trigonometric functions of θ.  Simplify your answers and use the / symbol for fractions.

Sin θ =

Cos θ =

Tan θ =

Answer 1

(8, -6) is a point in the 4th quadrant with sines negative, cosines positive, tangents negative

the hypotenuse of a right triangle with sides 8 and 6 is 10 = radius

sinx = -6/10 = -3/5 = -0.6

cosx = 8/10 = 4/5 = 0.8

tanx = sinx/cosx = -.6/.8 = - 3/4 = -0.75