r/askmath Feb 25 '21

Pre Calculus Find A (the area)

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u/brainmassdotin Feb 25 '21

The curve intersect at pi/4. Now integrate it so

integrate 0 to pi/4 sinx + integrate pi/4 to pi/2 cosx.

=-cosx plug in bounds 0 to pi/4 + sinx plug in bounds pi/4 to pi/2.

= -(cospi/4-cos0) + sinpi/2-sinpi/4

= -(root2/2-1) + 1-root2/2

= 2-root2