Het product
sin(90°−α).cos(90°−α).tan(90°−α)
is gelijk aan
A.  1
B.  sin α
C.  cos α
D.  cos² α
E.  − cos² α
A    B    C    D    E

[ 4-1854 - op net sinds 6.4.2020-(E)-8.11.2023 ]

Translation in   E N G L I S H

sin(90°−α).cos(90°−α).tan(90°−α)
is equal to
A.  
B.  
C.  
D.  
E.  

Oplossing - Solution

... = cos α . sin α . cot α = cos α . cos α = cos² α
gricha