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Mathematics 7 Online
OpenStudy (anonymous):

if sin5x + sin 3x = sin x = 0 then the value of x in the interval 0

OpenStudy (experimentx):

are you hungry??

OpenStudy (anonymous):

why??

OpenStudy (experimentx):

whats up with pie??

OpenStudy (experimentx):

lol

OpenStudy (anonymous):

sorry

OpenStudy (anonymous):

now look the ?

OpenStudy (experimentx):

sin 3x + sin 5x = 2 sin 4x cos x = 2 4 sin x cos x cos 2x cos x = sin x 8 cos^x cos 2x = 1 = 0 <-- this doesn't fit

OpenStudy (experimentx):

looks like time to wolfram

OpenStudy (experimentx):

the only solution is zero http://www.wolframalpha.com/input/?i=solve+sin5x+%2B+sin+3x+%3D+sin+x

OpenStudy (experimentx):

anyway what's your answer??

OpenStudy (anonymous):

60 degree

OpenStudy (experimentx):

must be some error in question http://www.wolframalpha.com/input/?i=sin+%285pi%2F3%29+%2B+sin+%283pi%2F3%29+%3D+0

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