Question

can someone help me with the question in the attachment below please? im really confused ! :/

Answer 1

What is the opposite side to angle A?

Answer 2

SOHCAHTOA

Answer 3

wouldnt it be the lowercase a ?

Answer 4

If you're talking about the opposite side to angle A, yes, it is a.
Now, what is the hypotenuse (side opposite to the right angle) of the right-angled triangle?

Answer 5

would it be c

Answer 6

Exactly.
Now, sin A = opposite side to angle A / hypotenuse
= ...?

Answer 7

umm . . . C

Answer 8

No...
opposite side to angle A = ?

Answer 9

a

Answer 10

hypotenuse = ?

Answer 11

i dont know im soo confused . . .

Answer 12

hypotenuse = side opposite to the right angle = ?

Answer 13

c ? becasue its the opposite of the right angle

Answer 14

Yes.
Now opposite side to angle A = a
hypotenuse = c

sin A = opposite side to angle A / hypotenuse = ... ?

Answer 15

would it be c ?

Answer 16

A/C ?

Answer 17

Yes! More appropriate one, a/c

Answer 18

so all i had to do was find the opposite sides ?

Answer 19

and hypotenuse
That's because of the definition of sine ratio: opposite side to the angle / hypotenuse .
Clear?

Answer 20

oh okay, yes it is very clear now !
but now im wondering if you would mind helping me with another problem it has to do with sine and cosine ?

Answer 21

I'm sorry that I have to go now. You're welcome to post new questions here. I'm sure other OS users will help you :)

Answer 22

okay, well thank you so much you were a B I G help ! (:

Answer 23

Still here?

Answer 24

yes !

Answer 25

Well, I'm here to help, if it would be of use :D

Answer 26

yes thank you ! there is this other question and it has to do with sine & cosine & i dont get it so ill post the attachement in a sec !

Answer 27

Lol, ok, this is fun :)
What do we know about sine?

Answer 28

You still there? Work with me here, we'll do this step by step... unless you prefer otherwise.

Answer 29

opposite side / hypotenuse

Answer 30

That's right :D
So if the sine of the angle is 3/5, what must be the measure of the opposite side?
And what must be the measure of the hypotenuse? :)

Answer 31

5 ?

Answer 32

5 is the... opposite side or the hypotenuse?

Answer 33

hypotenuse

Answer 34

Correct, so 3 must be the opposite side, yes? :)

Answer 35

yes !

Answer 36

I'll draw it for you, but in time, you'll be able to do this mentally, I promise :)