Question

cos(1440)

Answer 1

tan(7PI)

Answer 2

do you see that is is just cos (360*4). And it is a circle so we can ignore the 4 and we want cos 360 or cos 0, same thing. Google the unit circle so you can see it, but cos is the x-value and the answer is 1

Answer 3

thanks

Answer 4

tan(7pi)

Answer 5

tan of 7pi is the same thing as tan pi. we can ignore the rotations around the circle

Answer 6

tan is sin/cos, sin pi is 0 cos pi is -1, 0/-1 is 0

Answer 7

double thanks

Answer 8

Again I want you to look up the unit circle

Answer 9

If you memorize it your life will be easier

Answer 10

i did but it just my teacher gave us hard homework

Answer 11

sin(9pi/2)

Answer 12

Your going to have to do this one yourself. first step is to simplify it.

Answer 13

what is 9/2 as decimal?

Answer 14

4.5

Answer 15

so it is 4.5pi, and what do you know about one full rotation in radians?

Answer 16

?

Answer 17

360 degrees is equal to 2pi

Answer 18

oh

Answer 19

answer is 1

Answer 20

so we can ignore 4pi of the 4.5pi and we just have pi/2. This is because we are just running around the circle back to the same spot so it doesnt matter

Answer 21

correct!!

Answer 22

thanks

Answer 23

yw

Answer 24

cos(23pi/6)

Answer 25

Unit circle FTW.

Answer 26

I can't keep doing your hw for you. It always helps me to convert to decimal because I hate fractions, and attack the problem like we did just before this one. Good luck

Answer 27

square3over2

Answer 28

thanks for the help very much appreciated