Answer:
-cos(2A)
Step-by-step explanation:
We know that (a+b) (a-b) = a^2-b^2
So it means we can simplify to sin^2(A)-cos^2(A) and we know cos^2(A) - sin^2(A) = cos(2A) but we will just multiply by -1 and we get - cos(2A)
The square root of 3 would be irrational. 0 and 10 are whole numbers so we can mark them out right off the bat. When you turn 3/7 into a decimal, it terminates making it rational as well.
The cost of similar carpet in the client's bedroom is $225
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Area of Shapes</h3><h3 />
Given Data
- Area of Office = 16*19.2 = 307.2 square feet
- Area of Bedroom = 12*10 = 120 square feet
if 307.2 square feet of carpet will cost $576
the 120 square feet of carpet will cost $x
cross multiplying we have
x = 120*576/307.2
x = 69120/307.2
x = $225
Learn more about area of shapes here:
brainly.com/question/2607596
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