64.

65.

Write the three commonly used trig functions and the formula for

each:

________________ θ = __________________

________________ θ = __________________

________________ θ = __________________

65.

66.

On the vector diagram below, you are given values for the y vector

and the x vector and will solve for

. When the side opposite and

the side adjacent are given, use the TANGENT function.

NOTE: These vectors are in the IV quadrant and are treated in the

same manner as vectors in the first quadrant. In both

quadrants, the angle θ is the angle between the x vector

and the r vector; and the y vector is the side opposite.

Solve for

.