2 cos
2
(− α) + 2 sin
2
(− α)
=
A. 1
B. 2
C. − 3
D. 4
E. − 4
[ 4-3120 - op net sinds 12.12.01-(E)-4.11.2024 ]
Translation in E N G L I S H
2 cos
2
(− α) + 2 sin
2
(− α)
=
A. 1
B. 2
C. − 3
D. 4
E. − 4
Oplossing - Solution
2 cos² (− α) + 2 sin² (− α)
= 2.
[
cos² (− α) + sin² (− α)
]
= 2.1 = 2