Welke uitspraak is waar
voor alle hoeken α ?
A.  sin ( pi/2 + α ) = cos ( π + α )
B.  cos ( pi/2 + α ) = sin ( π + α )
C.  tan ( pi/2 + α ) = cot ( π + α )
D.  cot ( pi/2 + α ) = tan ( π + α )
E.    z e  z i j n  a l l e  v i e r  f o u t
A    B    C    D    E 

[ 4-4391 - op net sinds 9.6.2020-(E)-22.10.2023 ]

Translation in   E N G L I S H

IN CONS
IN CONSTR
IN CONSTRUC
IN CONSTRUCTI
IN CONSTRUCTION
which one is correct? 		A.  
B.  
C.  
D.  
E.  

Oplossing - Solution

cos ( pi/2 + α ) = sin [ pi/2 − ( pi/2 + α )] = sin [ pi/2 − pi/2 − α ) = sin ( − α ) = sin ( π + α )
gricha