Question

A nick on the edge of a CD rotates to (−6, 5) during one song when represented graphically. What is the sine value of this function?

Answer 1

I would first try to graph the point :

sin Angle = opposite / hypotenuse

the opposite side has length 5
we need the length of the hypotenuse. Use pythagoras to figure out the length of the hypotenuse.
i.e. a^2 + b^2 = c^2

can you find the length of the hypotenuse ?

Answer 2

I don't understand what would I have to do to find the hypotenuse?

Answer 3

@ThereisnoUsername

Answer 4

A and B are practically X and Y,
C is unknown yet,
so plug in the X and Y values,
what do you get?

Answer 5

can you set it up with the variables having numbers?

Answer 6

What is the X value,

Answer 7

-6

Answer 8

okay, and the Y?

Answer 9

5

Answer 10

okay, so now plug that in for A and B :
(5)^2 + (-6)^2 = c^2,
and what do you get?

Answer 11

you could also look at it vice versa:

(-6)^2+(5)^2=c^2

Answer 12

61?

Answer 13

yes,
okay so now we have:
61=c^2 ,
and simplify:
7.81 = c

Answer 14

is that equivalent to -sqrt of 61?

Answer 15

no the square root of 61 is 61,


5/7.81 = Sin Angle
so divide them and what do you get?

Answer 16

0.640

Answer 17

okay so I think the answer is:
5 times square root 61 over 61

Answer 18

thank you! do you mind helping with more ?

Answer 19

sure open a new question and tag me,

Answer 20

okie dokie