Answer:
Area = 140
16 x 8.75 = 140
Step-by-step explanation:
Since sin(2x)=2sinxcosx, we can plug that in to get sin(4x)=2sin(2x)cos(2x)=2*2sinxcosxcos(2x)=4sinxcosxcos(2x). Since cos(2x) = cos^2x-sin^2x, we plug that in. In addition, cos4x=cos^2(2x)-sin^2(2x). Next, since cos^2x=(1+cos(2x))/2 and sin^2x= (1-cos(2x))/2, we plug those in to end up with 4sinxcosxcos(2x)-((1+cos(2x))/2-(1-cos(2x))/2)
=4sinxcosxcos(2x)-(2cos(2x)/2)=4sinxcosxcos(2x)-cos(2x)
=cos(2x)*(4sinxcosx-1). Since sinxcosx=sin(2x), we plug that back in to end up with cos(2x)*(4sin(2x)-1)
Answer:
Step-by-step explanation:
rise over run
from the bottom to where the point is
From (0,0) to (4,3)
you rise 3 and run 4
So I think the Slope is 3/4
They spent a total of $46.25
Here's how I got my answer:
Step 1: Add $18.00 and $16.40 together. Which is $34.50.
Step 2: Add $34.50 and $11.75, which will give you your answer, $46.25.
