Mathematics, 04.02.2020 15:48 kimbyrleeclark

Explain thoroughly.

find the derivative of t in xcos(t). i know the answer is -xsin(t). but why can't we use the product rule on this and get -x*sin(t) + cos(t). in other words, why do we use the constant multiple rule on x? isn't x a variable?

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find the derivative of t in x*cos(t). i know the answer is -x*sin(t)...

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More questions: Mathematics Another questions

Explain thoroughly. find the derivative of t in x*cos(t). i know the answer is -x*sin(t). but why can't we use the product rule on this and get -x*sin(t) + cos(t). in other words, why do we use the constant multiple rule on x? isn't x a variable?

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Another question on Mathematics

Explain thoroughly.

find the derivative of t in xcos(t). i know the answer is -xsin(t). but why can't we use the product rule on this and get -x*sin(t) + cos(t). in other words, why do we use the constant multiple rule on x? isn't x a variable?