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For an acute angle 9, sin 8 + cos 8 takes the greatest value when $θ$ is:

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detailed solution

Correct option is B

y= sinθ + cosθ takes the greatest value if dydθ = 0= cosθ - sinθ= 0= tanθ = 1= θ = 45°

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For an acute angle 9, sin 8 + cos 8 takes the greatest value when θ is:

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Ready to Test Your Skills?

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For an acute angle 9, sin 8 + cos 8 takes the greatest value when $θ$ is: