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Cos210^o

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Cos210^o

    • Posted by Tanveee Alam 6 years, 8 months ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Jagdish Padaliya 6 years, 8 months ago

    cos(90*2+30)° here Cos thita lie on the third quadrant so thita will be -ve and value of cos 30° is under root3 by 2 so the value of cos210° is -under root3 by 2

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