The area bounded by the curve between and in the first quadrant is :
The area bounded by the curve between and in the first quadrant is :
Solution
We need the area under , above the -axis, from to .
Whenever we need the area under a curve, we use definite integration — think of it as summing up infinitely thin vertical strips between the curve and the -axis.
Setting up the integral:
Since both and are non-negative between and , we are entirely in the first quadrant.
Applying the power rule :
Substituting the upper and lower limits:
Don't confuse this with area under or which also commonly use to as limits. Here the curve is , a basic polynomial, so we simply apply the power rule — no trigonometry involved.
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