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Substitution Method to Remove Indeterminate Form

Find the valu...

Question

Find the value of x, for the maximum and minimum of the function $sin x$

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Solution

Max value of $sin x$ is $1$
$⟹ x = \frac{π}{2}$
Min value of $sin x$ is $- 1$
$⟹ x = - \frac{π}{2}$

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