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)
Answer:
32, because when you are dividing by a fraction, you can multiply by the divident by reciprocal of the divisor.
Step-by-step explanation:
4 ÷ 1/8
4/1 ÷ 1/8
4/1 × 8/1
4 × 8
32
When you are dividing by a fraction, you can multiply by the divident by reciprocal of the divisor.
Answer:
-10
Step-by-step explanation:
Let x = number
10 less than a number is the same number doubled
x-10 = 2x
Subtract x from each side
x-10-x = 2x-x
-10 = x
The number is -10