SOLUTION: What's the measure in radians of the smallest positive angle x that will give the maximum value for y=3-cos(2x)? A)0 B)pi/2 C)pi D)3pi/2

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Question 1089355: What's the measure in radians of the smallest positive angle x that will give the maximum value for y=3-cos(2x)?
A)0
B)pi/2
C)pi
D)3pi/2
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+y+=+3+-+cos%28+2x+%29+
The max value is when the cos function is -1
+cos%28+2x+%29+=+-1+
+2x+=+pi+
+x+=+pi%2F2+
(B) is the answer