Answer:
-cos^4(x)
Step-by-step explanation:
Step 1: Use the Pythagorean identity : 1=cos^2(x) + sin^2(x)
1-sin^2(x) = cos^2(x)
-1+sin^2(x) = -cos^2(x)
cos^2(x) (-cos^2(x))
Step 2: Factor out common terms cos^2(x)
cos^2(x) (sin^2(x)-1)
Ans: -cos^4(x)
5,12,13
5X5=25
12X12=144
25+144=169
answer: square root 169=13
Okay? Whats the point? If You're trying to find out how long it would take then you would have to make $500 so 45 more hours until you can get it.
