Answer:
all you need to do is fine the difference of the numbers
Step-by-step explanation:
I am guessing that you mean 2cos2(45° - x) = 1 + sin2x
According to a double angle identity, 2cos2θ - 1 = cos(2θ)
So, 2cos2(45° - x) - 1 = cos (90° - 2x)
= cos90°cos2x + sin90°sin2x
= (0)cos2x + (1)sin2x
= sin2x
Thus, 2cos2(45° - x) = 1 + sin2x
Answer:
$22
Step-by-step explanation:
($8.25x4)x2/3
=33x2/3
=$22
(4 + 4 - 0.4) / 0.4 = (8 - 0.4) / 0.4 = 7.6 / 0.4 = 19