< 3 match the expressions with their solutions.

1 ) sin 165°

2 ) cos 330°

3 ) Tan 157.5°

4 )

Step-by-step explanation:

1 )

Given expression is  

We know that

So the first expression is sin (330/2)° =sin 165°

2 )

GIven expression is  

We know that

So the result is cos 330°

3 )

Given expression is

We know that

Also we know that sin2x = 2sinxcosx

So The numerator becomes . and the denominator becomes as

So the result is Tan 157.5°

4 )

Given expression is

We know that

So the result is

do i do it on a graph?

step-by-step explanation:

f is the midpoint of