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Math Help - Solving differential equations by inspection and etc...

  1. #1
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    Solving differential equations by inspection and etc...

    1. Solve the following DEs, by inspection.
    (a) y= -sin x

    2.Verify that the given function is a solution to the DE. Then determine c that satisfies the conditions given.
    (a) xy = y ; y = cx; y=pie when x = 2

    I have no clue how to start these 2 questions,,, Help please!

    Thank you.
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  2. #2
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    Re: Solving differential equations by inspection and etc...

    a). You're lacking some basic knowledge. Before you start solving differential equations you should know among other things that if y=cos x then dy/ dx = -sin x.

    b) Separate the variables.
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  3. #3
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    Re: Solving differential equations by inspection and etc...

    Quote Originally Posted by tjsdndnjs View Post
    (a) xy = y ; y = cx; y=pie when x = 2
    You are about to be visited by Phil, the Prince of Insufficient Light and Ruler of Heck!!!

    C'mon! You're in Calculus. It's spelled "pi" darn it all!

    -Dan
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