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Show that (sinx-siny)/(cosx+cosy)=tan((x...

Show that `(sinx-siny)/(cosx+cosy)=tan((x-y)/2)`

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Knowledge Check

  • inte^x(cosx- sinx)dx=

    A
    `-e^xcos+C`
    B
    `e^xsinx+C`
    C
    `-e^xcos+C`
    D
    `e^xcosx+C`

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