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Mathematics: Post your doubts here!

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upload_2016-4-6_12-48-34.png
can anyone plzz help me with this qtn
 

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NO offence but the sort of questions you're asking are very basic which means you haven't quite understood the concept. So you need to do that first before doing past papers
ok i know that i am not very good in s1 and there is no time for revision now its time for pastpapers and so
may u help me in any of the posts
 
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Oh alright.

So we have to ignore the 4 that is being multiplied with cos^2x and the other function.
Yes. Even if you don't ignore the 4 you will get rid of it by dividing 4 on both sides and 0/4 is still 0. The other function was in terms of y so I decided to ignore it.
 
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Aoa can anyone solve the last part , plus also explain the concept thanks.
 

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