SOLUTION: determine the exact values of x in the interval [0,2pie] that satisfy cos(2x)=0
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Question 209389: determine the exact values of x in the interval [0,2pie] that satisfy cos(2x)=0
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
cos (x) = 0 when x = 90 and when x = 270 degrees.
cos (2x) = 0 when 2x = 90 and when 2x = 270 degrees.
2x = 90 when x = 45
2x = 270 when x = 135
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i believe your answers are:
x = 45
x = 135
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