Question

Find the value of cos θ for the angle shown.

Answer 1

\[(4,-\sqrt{33})\]

Answer 2

so far i got up to \[\sqrt{(4)^{2}+(-\sqrt{44)^{2}}}\]

Answer 3

Yes, use that formula to find the missing side

Answer 4

You put -33 in the question, but -44 in the formula. make sure you have the right one

Answer 5

sorry i ment to put -33

Answer 6

\[\sqrt{(4)^{2}+(-\sqrt{33)}^{2}}\]

Answer 7

Okay, good. do you know how to solve that ?

Answer 8

not the \[-\sqrt{33^{2}}\] part

Answer 9

When you square a radical, it just cancels it completely. So it's just 33

Answer 10

it would become a positve 33

Answer 11

Correct, when you square a number, any number, it's always positive

Answer 12

ok so it would become 7

Answer 13

Thats right so

Answer 14

then it asking for cos so it would be \[ \frac{ adjacent}{ hypotense }\]

Answer 15

That's right, I just posted the graph, what do you think the cos of the angle is?

Answer 16

\[\frac{ \sqrt{33} }{ 7 }\]

Answer 17

That's the sin of the angle

Answer 18

4/7