Question

the maximum value of the function

$y = \sin(x ) + \cos(x)$
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Answer 1

Answer:

-2/√2 = -√2 [this satisfies the condition of the maximum graph (y) at 1st derivative, which is positive (+) before the turning point, and at 2nd derivative, which is negative after the turning point]. Therefore, the maximum value of: Sinx + Cosx = Sin45°...