I tried solving with respect to x axis but I seem to be getting the incorrect an

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junior college 2 | H3 Maths
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junior college 2 H3 Maths Singapore

I tried solving with respect to x axis but I seem to be getting the incorrect answer for part i

Date Posted: 4 years ago

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this is my working

Date Posted: 4 years ago

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Hey! You’re on the right track, just that your integration of cos square is wrong. You have to use the double angle formula (see first line.)

Date Posted: 4 years ago