Answer:
Cos 2u = 7/25
Step-by-step explanation:
Here, we want to find the value of cos2u
Using formula, we can rewrite cos 2
Mathematically;
cos 2u = 2cos^2 U - 1
Thus, we have that
cos 2u = 2(4/5)^2 - 1
cos 2u = 2(16/25) - 1
cos 2u = 32/25 - 1
cos 2u = (32-25)/25 = 7/25
