Consider the function f(x,y)=x^2+y^2 where x=sin2θ and y=cos2θ df/dθ is given by? I know this involves the chain rule and trig id. But I'm still not getting it Kindly assist.
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Originally Posted by KayPee Consider the function f(x,y)=x^2+y^2 where x=sin2θ and y=cos2θ df/dθ is given by? I know this involves the chain rule and trig id. But I'm still not getting it Kindly assist. Since is a function of and are functions of , then is a function of so makes sense. The chain rule is . So calculate all of the derivatives and substitute them into (1). Finally, use your expressions for to get your final answer.
Originally Posted by KayPee Consider the function f(x,y)=x^2+y^2 where x=sin2θ and y=cos2θ df/dθ is given by? I know this involves the chain rule and trig id. But I'm still not getting it Kindly assist. What does equal? What is the derivative of a constant?
Originally Posted by Prove It What does equal? one What is the derivative of a constant? 0 how would these two answers help me arrive at the final answer thanks
Originally Posted by KayPee 0 how would these two answers help me arrive at the final answer thanks Look at your expression for f(x, y). Now look at what Prove It wrote. Join the dots.
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