Right side of the equation:
cos ( A - B ) - cos ( A + B ) =
= cos A cos B + sin A sin B - ( cos A cos B - sin A sin B ) =
= cos A cos B + sin A sin B - cos A cos B + sin A sin B =
= 2 sin A sin B - left side of the equation ( correct )
Centimeter is smaller than a meter
Answer:
(B)
Step-by-step explanation:
(A)The given equation is:

Substituting the value of x=20, we get



(B) The given equation is:

Substituting the value of x=20, we get


(C) The given equation is:

Substituting the value of x=20, we get


(D) The given equation is:

Substituting the value of x=20, we get


Thus, the equation
results in the highest earning y.
Take 19.95 and subtract 17.85 from it to get 2.10. Divide 2.10 by 19.95 to get 0.105. Multiply that by 100 and you get 10.52. So it's 10% or maybe 11% if you're supposed to round. Hope this helps