Question

What is sin theta given (–3, 4) is a point on the terminal side of theta?
3/5* My anwser
4/5
-4/5
-3/5


What is cos theta given (–2, 9) is a point on the terminal side of theta?

-9 sqrt 85/85
2 sqrt 85/85
-2 sqrt 85/85
9 sqrt 85/85* my anwser

The line with equation 3b – a = 0 coincides with the terminal side of an angle x in standard position in Quadrant III. What is cos x?

-sqrt10/10
-3sqrt10/10
sqrt10 * my anwser
1/3

The line with equation a + b = 0 coincides with the terminal side of an angle x in standard position in Quadrant II. What is tan x?