Question

The cosine of an angle whose terminal side falls in the second quadrant is -.1234. What is the sine of this angle?
a. .9924
b. .1234
c. .5606
d. not enough information is given

Answer 1

This is the exact same thing as before.

Answer 2

What did you learn from the previous problem?

Answer 3

(-.1234)^2+sin^2θ=1?

Answer 4

Use this identity to get sin(x). Then adjust the sign according to the quadrant.
cos^2(x) + sin^2(x) = 1

Answer 5

Perfect. Now solve it

Answer 6

I can't get this to come out right.

Answer 7

What did you get for -.1234 squared?

Answer 8

.01522756

Answer 9

What did you get when you subtracted that from 1?

Answer 10

.98477244

Answer 11

What did you get when you hit your square root button?

Answer 12

.99235701237

Answer 13

Then why don't you select that answer?