Step-by-step explanation:
Given c = longest of triange = 15m
Given b = short side of triangle = 9m
By pythagoras' Theorem,

The correct answer is -6m-n+3. You have to simplify the expression.
By definition, the sine of an angle is given by:

Where,
C.O: opposite leg
h: hypotenuse
The hypotenuse is given by:

So, replacing values we have:

Rewriting we have:
Answer:
the sine value of this function is:
A)5 times square root 61 over 61