Two trig questions (1 Viewer)

[mj8]

Question 9 I have no idea where to start.
Question 10 i figured out how to get xcos0 but i dont know how to get ysin0.
These are from cambridge 3u year 11 and theres no answers for these two questions at the back.

 

[fan96]

Q9)

Construct lines:

Let

(or any pronumeral of your choice)

Remember that


and that can both be written as sums of intervals.

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Q10)

This question becomes trickier if you don't construct .

Find , and note that

You'll get by factorisation.

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I've tried giving you hints, so tell me if you need more.

 

[Drongoski]

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