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Isra

  • 3 years ago

sin30 cos 60+sin 60 cos 30

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  1. itsmylife
    • 3 years ago
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    use Sin(a+b)=sin(90) =1

  2. itsmylife
    • 3 years ago
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    sin(a+b)=sin a cos b + cos a sin b where a=30, b=60

  3. marsss
    • 3 years ago
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    sinx cosy + siny cosx=sin(x+y) so sin(30+60)=sin90=1

  4. itsmylife
    • 3 years ago
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    ;)

  5. Isra
    • 3 years ago
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    ok thanks :)

  6. itsmylife
    • 3 years ago
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    ;) yw

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