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What is the value of (x + y)2y' if x = et sint and y = et cost?

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MCQs on limits, trigonometric functions limits, derivatives and its intuitive idea, first and second order derivatives.
 


What is the value of (x + y)<sup>2</sup>y' if x = e<sup>t</sup> sint and y = e<sup>t</sup> cost?






 
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