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hardequalsmath

  • one year ago

cos(2y)cos(y) - sin(2y)sin(y)

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  1. dan815
    • one year ago
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    http://www.maths.manchester.ac.uk/~cds/internal/tables/trig.pdf

  2. dan815
    • one year ago
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    try some other trig identities in there if that doesnt simplify it

  3. hardequalsmath
    • one year ago
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    so would it be cos2A * sin2A - 2 sinA * cosA?

  4. dan815
    • one year ago
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    it will simplify to cos(3y)

  5. hayden4290
    • one year ago
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    just plug it in ur calc matway.com is a great one .... cos(3y)

  6. dan815
    • one year ago
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    |dw:1373582879587:dw|

  7. hardequalsmath
    • one year ago
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    thanks

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