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OpenStudy (anonymous):
oops sorry i didn't complete the question. it should be: solve the equation: cos 3x = cos 2x 0˚< x < 360˚
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OpenStudy (anonymous):
when does just cos(x) = 0?
OpenStudy (campbell_st):
the obvious answeer is x = 0 but unfortunately there are other solutions
OpenStudy (campbell_st):
ok... an easy solution is to graph the 2 curves and find the points of intersection in the given domain. The algebraic solution is tedious.
OpenStudy (campbell_st):
here is a graphical solution the graph is in radians and not degrees, sorry about that
OpenStudy (anonymous):
Thank you!!!
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