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love_math
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and?

love_math
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what do you want? find value of x?

bevandre
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yes to find the value of x.

sauravshakya
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cos3x=0
cos3x=cos(90+n 360) , cos(90+n360)
3x=(90+n 360) or (90+n360)
x=(30+n120) or (30+n120)

sauravshakya
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where n is any integer

bevandre
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thank
you!