How do i get rid of the sin (x-pi/4) in both of these problems? | Mathematics | Page 1

cold prairie Jan 30, 2023, 12:14 AM

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sharp lanceBOT Jan 30, 2023, 12:14 AM

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sonic belfry Jan 30, 2023, 12:52 AM

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Do you know the angle subtraction formulae?

cold prairie Jan 30, 2023, 1:30 AM

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Kinda

ancient mauve Jan 30, 2023, 1:55 AM

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@cold prairiethere is a way to do it

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you have to use one of those formulas

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it said that sin(a+b)=sin(a)cos(b)-sin(b)cos(a)

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try to use that formula

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same thing with cos(a-b)

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for the second term

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in the expression

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cos(a-b)=cos(a)cos(b)+sin(a)sin(b)

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I hope that helped! 👍

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if you are wondering what those formulas are called search up "Sine and Cosine addition and subtraction formulas"

cold prairie Jan 30, 2023, 3:31 AM

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Ty

craggy dew Feb 8, 2023, 12:46 PM

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the answer is root2 sinx

#How do i get rid of the sin (x-pi/4) in both of these problems?