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The value of Cos 105° is

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The value of Cos 105° is

    • Posted by Tarun Ch 5 years, 6 months ago

    CBSE > Class 12 > Mathematics
    • 2 answers

    Madhu B 5 years, 6 months ago

    Cos105°=cos(45°+60°) Now, cos(a+b)=cosAcosB-sinAsinB And putting values cos45=1/√2 cos60=1/2 Sin45=1/√2. Sin60=√3/2 And we can get the ans

    2Thank You

    Ayush Vishwakarma?? 5 years, 6 months ago

    Cos(60+45) and apply the formula cos(a+b) that is cosa×cosb-sina×sinb .. let a=60degree and b=45 degree an its value is 60=1/2 and 45=1/root2.

    2Thank You

    ANSWER
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