What is the value of {sin (90 - x).cos[π - (x - y)]} + {cos(90 - x).s – McqOptions

MCQOPTIONS

1.	What is the value of {sin (90 - x).cos[π - (x - y)]} + {cos(90 - x).sin [π - (y - x)]}?
A.	-cos y
B.	sin y
C.	cos x
D.	tan y
Answer» B. sin y

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