Question

Help with 3 quesetions? I don't know how to do this!

Answer 1

@satellite73

Answer 2

@amistre64

Answer 3

@campbell_st

Answer 4

@Luigi0210

Answer 5

@zepdrix

Answer 6

trig is like 98% memorization

Answer 7

how do you define the ratio of sides to define a cosine function?

Answer 8

o.O

I have no idea what you just said.

I am very new to this.

Answer 9

there are 3 basic trig functions; can you name them?

Answer 10

Triangles, Circles, and Equations?

This is supposed to be Algebra 1..not Trigonometry.

Answer 11

trigonometry is triangle geometry. and it deals with representing right triangles onto circles.

Answer 12

Okay.

Answer 13

whatever class they are trying to teach this in is regardless. they must have defined for you the 3 basic trig functions to work with.

Answer 14

So the only thing I understand in the question is: Use this triangle to find the value of cos B. But I don't know what 'cos B' is..

Answer 15

cos is a short way to write cosine. cosine is one of the 3 basic trig functions. cosine is defined by a ratio of the legs of a right triangle; namely: the leg next to the angle, and the hypotenuse.



in this general drawing: the leg labeled a is next.to the angle alpha
the leg labeled b is over from the angle alpha
and the hypotenuse is not a leg perse, but is needed nonetheless

Answer 16

Oh, I see.

Answer 17

\[sin\alpha=\frac{over}{hyp}\]
\[cos\alpha=\frac{next.to}{hyp}\]
\[tan\alpha=\frac{sin\alpha}{cos\alpha}\]