trig a level | Revision Server | Page 1

acoustic harness Feb 13, 2023, 10:13 PM

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solid haven Feb 13, 2023, 10:39 PM

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how much marks is that?

acoustic harness Feb 13, 2023, 11:29 PM

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4 marks dk of im supposed to use double angle or addition formulae and how

sly zephyr Feb 14, 2023, 12:15 AM

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this is what i did using double angle formula

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and addition

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@solid haven

solid haven Feb 14, 2023, 12:19 AM

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yeah I don’t think that’s on the year 12 as level edexcel spec since I’ve never come across this

sly zephyr Feb 14, 2023, 12:20 AM

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I used that cos(2x)= cos^x-sin^x

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and then i did the addition formula

simple dock Feb 16, 2023, 10:07 PM

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i'll do worked sol for that in abt 15 mins

#trig a level