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March 30, 2017

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sin 30degrees cos 240degrees + sin 210degrees sin 300degrees.

-1/4 + sqrt3/4

what is the last step ?? the negative and positive signs confuse me ??

  • math - ,

    What do you mean last step?

    That is the answer. You can't add
    -1/4 + (sqrt(3))/4

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