Answer:30
Step-by-step explanation:
Let's check.
x = 5π/24
4x = 5π/6
cos 4x = cos(5π/6) = cos 150° = -√3/2
cos² 4x = (-√3/2)^2 = 3/4
4 cos² 4x -3 = 4 (3/4) - 3 = 0
Answer: TRUE
Substitute the number 21 for all the letter d's:
(21-10) + (21/3) = ?
11 + 7 = 18
Answer:
64
Step-by-step explanation:
