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sin(x+pi) in terms of x

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Does this equal 0?
idk thats y i need help, this is how they gave it to me , it didnt say 0
sin(x+pi) is in the third quadrant. in the third quadrant only tan value is positive. pi=180 here sin(x+pi)=-sinx

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Does that make sense @rubyhunter?
right ajprincess
yea but is -sinx what they mean by in terms of x?
okay thanks
you can try this using the identity sin(x + pi) = cos(x)sin(pi) + sin(x)cos(pi) sin(pi) = 0 cos(pi) = -1 so you get cos(x)(0) + sin(x)(-1) = -sinx

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