Question

Solve each question in the interval from 0to 2 pi. Round your answer to the nearest hundredth. 3cos4theta=-2

Answer 1

@imqwerty hey do you think you could help me with this?

Answer 2

first divide both sides by 3

cos 4theta = ?

Answer 3

-2/3

Answer 4

right

now find the angle in the first quadrant whose cccccccccccccosine is 2/3

Answer 5

lol the c stuck!!

Answer 6

.78?

Answer 7

lol

Answer 8

we are working in radians right?

Answer 9

yes

Answer 10

i don't get 0.78

Answer 11

i think.. actually i have no idea

Answer 12

use ur calculator the key is probably marked cos-1

Answer 13

1.27

Answer 14

no

Answer 15

press cos-1 then (2/3) then enter or exe

Answer 16

.84

Answer 17

right!

now the cosine is negative in the 2nd and 3rd quadrants