- #1
jasper10
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Homework Statement
Find the zeroes of
f(x) = 1 + 2cos(2x+ π/3)
Range: (0 ; π)
The Attempt at a Solution
1 + 2cos(2x + π/3) = 0
hence, cos(2x + π/3) = -1/2
hence, 2x + π/3 = 2π/3
and, x = π/6 which is 30 degrees
can someone help me find the other 0 ?
I don't know how to!
Thanks a lot!
(the answer is x=π/2 but i don't know how to get there!)
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