Answer (-3,1) because the lines are intersecting there.
Cos (A - B) = cos A cos B + sin A sin B
cos (A + B) = cos A cos B - sin A sin B
cos 2x = cos (3x - x) = cos 3x cos x + sin 3x sin x
cos 4x = cos (3x + x) = cos 3x cos x - sin 3x sin x
1/2(cos 2x - cos 4x) = 1/2(cos 3x cos x + sin 3x sin x - cos 3x cos x + sin 3x sin x) = 1/2(2 sin 3x sin x) = sin 3x sin x.
Answer:
B) B only
Step-by-step explanation:
An equilateral triangle is a triangle that has all equal sides. Triangle B is the only one that has equal sides.
The equation of a circle:

(h,k) - the coordinates of the center
r - the radius

Plug the coordinates of the points into the equation and check:


The answer is
F(-2,6).