Question

http://img600.imageshack.us/img600/7443/2s93.png

Answer 1

Do you know about the 3,4,5 triangle?

Answer 2

\[
5^2 = 3^2 + 4^2

\]

Answer 3

no i don't

Answer 4

It is a right triangle since
\[
5^3 = 3^2 + 4^2
\]

Answer 5

\[
\sin(\theta) =\frac 3 5= \frac { opposite}{hypotenuse}\\
\tan(\theta)=\frac { opposite}{adjacent}=\frac 3 4

\]

Answer 6

Did you get it?

Answer 7

o okay so what does it =?

Answer 8

(sin θ)^2+(cos θ)^2=1 => (3/5)^2+(cos θ)^2=1 => 9/25+(cos θ)^2=1 => (cos θ)^2=1-9/25=16/25 => cos θ= ±√(16/25)=±4/5 => tan θ=sin θ/cos θ=(3/5)/(±4/5) => tan θ=±3/4

Answer 9

have u understood