Het kwadraat van
sin 15° + cos 15°
is gelijk aan
A.     \(1\)
B.     \(2\)
C.     \(\sqrt2\)
D.     \(\frac32\)
E.   \(\frac{\sqrt6\,-\,\sqrt2}{2}\)
    A    B    C    D    E

[ 5-7326 - op net sinds 8.12.2025-(E)- ]

Translation in   E N G L I S H

The square of
sin 15° + cos 15°
is equal to 		A.     \(1\)
B.     \(2\)
C.     \(\sqrt2\)
D.     \(\frac32\)
E.   \(\frac{\sqrt6\,-\,\sqrt2}{2}\)

Oplossing - Solution

(sin 15° + cos 15°)2 = sin² 15° + 2 . sin 15°. cos 15° + cos² 15°
= 1 + sin 30° = 1 + ½ = 1,5

GWB