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secondary 3 | A Maths
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Don't know how R formula works
Date Posted: 1 year ago
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Hope the scribbling is clear enough. We have to use the identity cos(a-b) = cos a cos b + sin a sin b.
Then we can convert any expression in the form A cos x + B sin x into the format R cos (x - alpha).
Then we can convert any expression in the form A cos x + B sin x into the format R cos (x - alpha).
Date Posted:
1 year ago
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