i accidentally posted these in the trig help forum.

10) Give that tan = -1/7 and sin > 0, use the x-y-r method to find sin and cos.

11) Sketch a 240° angle in standard position. Label a point on its terminal side, draw the right triangle in use, indicate the direction of opening, and give all six trig function values for 240°.

12) Sketch a 90° angle in standard position. Label a point on its terminal side and use the x-y-r method to compute the six trig function values for 90°.

13) In what quadrant(s) does terminate if sin > 0 and cos < 0?

Q1 Q2 Q3 Q4

14) In what quadrant(s) does terminate if tan < 0?

Q1 Q2 Q3 Q4

15) In what quadrant(s) does terminate if cos < 0?

Q1 Q2 Q3 Q4

17) Use a fundamental identity to find cos if sin = 1/5, that terminates in Q2. Show work.