3x-2 = 3x+4x+28x
3x-2 = 7x + 28
Answer:
cos 4u = co^s2 2u - sin^2 2u
Step-by-step explanation:
cos 4u = co^s2 2u - sin^2 2u
Let 4u = 2x
cos 2x = cos^2 x - sin^ 2 x
cos (x+x) = cos^2 x - sin^ 2 x
Using cos(x+y) = cos(x)cos(y) -sin(x)sin(y)
cos(x) cos(x)- sin(x) sin (x)= cos^2 x - sin^ 2 x
cos^2 (x) -sin^2 (x) =cos^2 x - sin^ 2 x
Since this is true
cos 2x = cos^2 x - sin^ 2 x
This is true
Substituting 4u back for 2x
cos 4u = co^s2 2u - sin^2 2u
This is true
Answer:
the measure of all angles are :
- m 3 = 82°
- m 2 = 82°
- m 6 = 82°
- m 7 = 82°
- m 8 = 98°
- m 1 = 98°
- m 5 = 98°
- m 4 = 98°
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About half way?
i have to do this for the 20 characters.
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