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aqa fp3 help

ImageUploadedByStudent Room1422796656.105690.jpg can anyone help me with how to approach part bii on this question. ive done parts a and bi and checked answers, all alright, but cant seem to get to the answer for bii and dont really know what method im supposed to be using, im just guessing tbh


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math42
20
Do you know the formula for integrating a polar equation? I'll assume you do but just in case

Spoiler



Basically, you can integrate to find the area between the arc OP and the line OP, and since you already have the area of the triangle finding the shaded area is just a matter of subtraction.
(edited 9 years ago)
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Avatar for TeeEm
TeeEm
19
Original post by tsr_username01
ImageUploadedByStudent Room1422796656.105690.jpg can anyone help me with how to approach part bii on this question. ive done parts a and bi and checked answers, all alright, but cant seem to get to the answer for bii and dont really know what method im supposed to be using, im just guessing tbh


Posted from TSR Mobile


look at some examples in the link

http://www.madasmaths.com/archive/maths_booklets/further_topics/various/polar_coordinates_exam_questions.pdf

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