Which expression is equivalent to (3a)–2?

Step-by-step explanation:

We have been given an expression

We can see that our expression have an negative exponent.

We will use property of exponents for negative exponents to simplify our expression, which states that . Upon using this property we will get,

Upon squaring 3a we will get,

Therefore, will be equivalent expression of our given expression.

sine

step-by-step explanation:

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value