True
<span>Cos(A+B)=CosACosB-SinASinB
therefore Cos(A+A)= CosACosA - SinASinA
= Cos^2A - Sin^2A</span>
Answer: x=-14
Step-by-step explanation:
Answer:
sale price = 408
Step-by-step explanation:
480 * 15/100 = 72
sale price = 480 -72 =408 (ans)
I'm going to have to say C.