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Old 04-05-2010   #4

jmw106462's Avatar
Join Date: Feb 2010
Posts: 388

sinx*sqrt(2 = 2sinxcosx
sqrt(2 = 2cosx
sqrt(2/2 = cosx

x = pi/4 and 7*pi/4

This is what the answer is very hard like mas1 said. Mostly the way you presented them, didn't queit get the problem at first. Hope you do well, good luck!
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