cos
2
x.cos
2
x + sin
2
x.cos
2
x
=
A. cos
2
x + 1
B. 2cos
2
x
C. cos
4
x + 1
D. cos
4
x
E. cos
2
x
[ 4-4913 - op net sinds 1.7.02-(E)-29.10.2023 ]
Translation in E N G L I S H
IN CONSTRUCTION
Oplossing - Solution
cos² x.cos² x + sin² x.cos² x = cos² x. (cos² x + sin² x) = cos² x
