math 7.1-7.4 identies/formulas
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Last updated 3:56 AM on 12/4/22
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7 Terms
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identity formulas
sin^2+cos^2=1
tan^2+1=sec^2
1+cot^2=csc^2
tan^2+1=sec^2
1+cot^2=csc^2
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sum/difference formulas
cos(A+B)=cos(A)cos(B)-sin(A)sin(B)
cos(A-B)=cos(A)cos(B)+sin(A)sin(B)
sin(A+B)=sin(A)cos(B)+cos(A)sin(B)
sin(A-B)=sin(A)cos(B)-cos(A)sin(B)
tan(A+B)=(tanA+tanB)/(1-tanAtanB)
tan(A-B)=(tanA-tanB)/(1+tanAtanB)
cos(A-B)=cos(A)cos(B)+sin(A)sin(B)
sin(A+B)=sin(A)cos(B)+cos(A)sin(B)
sin(A-B)=sin(A)cos(B)-cos(A)sin(B)
tan(A+B)=(tanA+tanB)/(1-tanAtanB)
tan(A-B)=(tanA-tanB)/(1+tanAtanB)
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cos2x
1-2sin^2x
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sin2x
2sinxcosx
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tan(x/2)
(1-cosx)/sinx
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cos(x/2)
+-√(1+cos(x))/2
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sin(x/2)
+-√1-cos(x)/2