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Proov that - cos ²x + …

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Proov that - cos ²x + cos ²(x+π/3) + cos²( x- π /3)=3/2

    • Posted by Aryan Sharma 7 years, 3 months ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Diwas Upadhyay 7 years, 3 months ago

    Its example of ncert ....u can understand from there only ....misc last example....

    0Thank You

    Rikku Mahto 7 years, 3 months ago

    Here, put cos^2x=1+cos2x/2

    0Thank You

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