The formulas in question are
sin²(x) = (1 - cos(2x))/2
cos²(x) = (1 + cos(2x))/2
Then
sin⁴(4x) = (sin²(x))²
… = ((1 - cos(2x))/2)²
… = (1 - 2 cos(2x) + cos²(2x))/4
… = (1 - 2 cos(2x) + (1 + cos(4x))/2)/4
… = 1/4 - 1/2 cos(2x) + (1 + cos(4x))/8
… = 3/8 - 1/2 cos(2x) + 1/8 cos(4x)
Parallel lines have the same slope. The slope of y = -1/3 x + 4 is -1/3.
The equation is
(y - 5) = -1/3 (x - 6)
y = -1/3 x -1/3 (- 6) + 5 = -1/3 x + 2 + 5 = -1/3 + 7
The equation is: y = - 1/3 x + 7
y = -1/3 x
Should be 3
hope this helps
The largest number that 8c could be is -15
