Question

MEDALS AND FAN
Sine is positive in quadrants I and II only.

True
False

can someone explain this please

Answer 1

This refers to the unit circle. If you've covered that you'll know what it looks like. If not its attached :) Different ones (Sine, Cos, Tan) are positive or negative in different quadrants.

Answer 2

SO IT WOULD BE FALSE?

Answer 3

??

Answer 4

Yup

Answer 5

THANK YOU SOO MUCH
can you help me with just one more

Answer 6

When Θ = 5 pi over 3, what are the reference angle and the sign values for sine, cosine, and tangent?

Answer 7

these where the only ones I had trouble on

Answer 8

@JFlaus ?

Answer 9

The reference angle is 60 degrees. You should be able to work it out from there ;)

Answer 10

um not really do i plug it in?

Answer 11

See the unit circle I attached above? The reference angle is theta. Depending on what quadrant you're working in you need different calculations. I attached an image to this message that shows you how to find the sign angle for each quadrant. Based on your knowledge from your question before you should be able to gwt it :)

Answer 12

thank you soo much

Answer 13

No Problem :)