Question

Can someone help me check these answers (Pre-Calculus)?

Answer 1

Anyone?

Answer 2

# 2 is wrong

Answer 3

Thank you! Is it sin 39 degrees?

Answer 4

yes

Answer 5

Anything else wrong? (there are five files attached, 13 questions total)

Answer 6

12 is wrong

Answer 7

13 is wrong

Answer 8

What's the answer to 12?

Answer 9

Also, is the answer to #13 cos 81 degrees?

Answer 10

@Mertsj

Answer 11

@campbell_st

Answer 12

12. -cosx
13. yes

Answer 13

Thanks! Is everything else correct?

Answer 14

Oh, and for #12, isn't cos(-u)=cosu?

Answer 15

@Mertsj

Answer 16

@Mertsj Are you there?

Answer 17

Yes it is.

Answer 18

But cos x is not equal to - cosx

Answer 19

So doesn't that mean that the answer is cos x because cos^2 x/cosx=cosx?

Answer 20

What is 1-sin^2x?

Answer 21

Oh, I see my mistake. Thank you :)

Answer 22

yw

Answer 23

Is everything else correct?

Answer 24

I didn't see anything else wrong.

Answer 25

Thank you so much!

Answer 26

yw