I've been asked this question in my uni homework and not sure how to expand it.
Expand sin(A + B + C) in terms of sin A, sin B, sin C, cos A, cos B, cos C.
How would i tackle this?
They also ask the same for cos(A + B + C)
Thankies =D
0
Trig help
Started by John, Oct 13 2006 06:53 PM
3 replies to this topic
#1
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Posted 13 October 2006 - 10:23 PM
I'd think you just expand it like sin(A+(B+C))=sinAcos(B+C)+cosAsin(B+C) then expand again to get sinA (cosB cosC - sinB sinC)+cosA (sinB cosC + sinC cosB)...
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#3
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Posted 13 October 2006 - 10:28 PM
i'm with him.
but whether or not you want to take mathematical advice off me is another matter....
but whether or not you want to take mathematical advice off me is another matter....
when i'm dancin' with you,
tomorrow doesn't matter,
turn that music up,
till the windows start to shatter,
cos you're the only one who can get me on my feet,
& i can't even dance
No Tomorrow - Orson
tomorrow doesn't matter,
turn that music up,
till the windows start to shatter,
cos you're the only one who can get me on my feet,
& i can't even dance
No Tomorrow - Orson
#4
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Posted 14 October 2006 - 01:04 AM
yeh that is how he did it- i gave him help dont you know 
which is shocking to me i must say. I think he just made a mistake in the expanding cos he had the right method
which is shocking to me i must say. I think he just made a mistake in the expanding cos he had the right method
If i am not here i am somewhere else
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