(1 + sinx).
[
1 + sin(− x )
] =
A. 1
B. (1 + sin x)
2
C. cos
2
x
D. (1 − sin x)
2
E. − cos
2
x
[ 4-4513 - op net sinds 13.1.05-()-29.10.2023 ]
Translation in E N G L I S H
See above
Oplossing - Solution
(1 + sinx).
[
1 + sin(−x)
]
= (1 + sinx).(1 − sinx) = 1 − sin² x = cos² x
