Couple of math problems that i need assistance please. What is the answer to these?

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1.What is the value of sinθ given that (3, −7) is a point on the terminal side of θ ? A. −(3√58/58) B. 7√58/58 C. −(7√58/58) D.3√58/58

2.The line with equation x + y = 0 coincides with the terminal side of an angle θ in standard position in Quadrant II .

What is the value of tanθ ?

Enter your answer in the box.

3.What is the reference angle for the angle with measure −(π/4) ?

A.π

B.7π/4

C.−(7π/4)

D.π/4

Guest May 31, 2018

edited by Guest May 31, 2018

Melody · Answer 1 · 2018-05-31T10:38:36

Start by plotting the point in the number plane.

Then you can use pythagoras's theorum to work out the value of the sides in the right angle triangle with the point given. that is (0,0) (3,-7) (3,0)

You are in the 4th quad so sine will be negative.

Guest · Answer 2 · 2018-05-31T04:30:14

#2) y/-x

#3) 7π/4