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[✓] Solve the highlighted area?

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How can I solve highlighted area? enter image description here

Answer
7 months ago
POSTED BY: Mariusz Iwaniuk
Answer
7 months ago

If you wanted to do that in Mathematica, you could write this,

Integrate[Cos[x], {x, -Pi/2, Pi/2}]

which returns 2.

POSTED BY: Christopher Wolfram
Answer
7 months ago

thanks you all. :)

Answer
7 months ago

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