Trigonometry. Watch

maheenk97
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HELP WITH THIS QUESTION. Q4. Answer please.
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TenOfThem
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(Original post by maheenk97)
HELP WITH THIS QUESTION. Q4. Answer please.
I assume that you know the rules for Sin(A+B) etc

Also that you know Sin and Cos of 120 and 150

So, what are you stuck on
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maheenk97
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How to carry our the question

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TenOfThem
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(Original post by maheenk97)
How to carry our the question

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Well, I assume that part (a) is ok - I, again, am assuming that you know the rules for sin(A+B) and cos(A+B)
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brianeverit
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(Original post by maheenk97)
HELP WITH THIS QUESTION. Q4. Answer please.
The answer is zero.
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davros
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(Original post by maheenk97)
How to carry our the question

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Have you written out part (a) as required?
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