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anonymous
 5 years ago
need help with these questions
http://locker.palcs.org/~jbaskwill/pc/54practice.pdf
anonymous
 5 years ago
need help with these questions http://locker.palcs.org/~jbaskwill/pc/54practice.pdf

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0cos x=sin 2x, cos x sin 2x =0, cos x (2sin x cos x=0, cos x(12sin x)=0, equate to zero... cos x=0 and 12sin x=0, 1= 2 sin x 1/2 = sin x x =arc cos 0 and x= arc sin 1/2 x=pi/2 and x=pi/6

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0check cos(pi/2)=sin(2xpi/2) 0 = o true cos(3pi/2)=sin2(3pi/2) 0=0 true A ans pi/2, 3pi/2
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