Cot (15 degrees) find the two common angles that differ by 15 degrees. rewrite this problem as the cotangent of a difference of those two angles.

We have to write 15 degree as the difference of two angles.

And

Now we have to use the formula of cotangent of a difference of those two angles.

And the formula is

THerefore,

And that's the required expressions .

answer: $34.31

step-by-step explanation:

$11.99 x 3 = $35.97

$35.97 - 10% = $32.37

$32.37 + 6% = $34.31

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.