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Using calculus find the maximum and mini...

Using calculus find the maximum and minimum values of `asinx+bcosx`.

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The correct Answer is:
`=-(a^(2))/(sqrt(a^(2)+b^(2)))-(b^(2))/(sqrt(a^(2)+b^(2)))-(a^(2)+b^(2))/(sqrt(a^(2)+b^(2)))=-sqrt(a^(2)+b^(2))`
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