Expression of the form a cos x ± b sin x and a sin x ± b cos x

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4 Terms

1
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a cos x + b sin x = ?

R cos (x - a)

2
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a cos x - b sin x = ?

R cos (x + a)

3
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a sin x + b sin x =?

R sin (x + a)

4
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a sin x - b sin x =?

R sin (x - a)