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What are the 3 Pythagorean identities?
cos²θ+sin²θ=1
1+tan²θ=sec²θ
1+cot²θ=csc²θ
what are the inverse trigonometry identities
arccos(x)=arcsin*sqrt(1-x²)
arcsin(x)=arccos*sqrt(1-x²)
What are the sum and difference identities for what sin is equal to?
sin(A+B)=sin(A)cos(B)-cos(A)sin(B)
sin(A-B)=sin(A)cos(B)+cos(A)sin(B)
What are the sum and difference identities for what cos is equal to
cos(A+B)=cos(A)cos(B)-sin(A)sin(B)
cos(A-B)=cos(A)cos(B)+sin(A)sin(B)
What is the sine double angle identities formula
sin(2A)=2sinAcosA
What are the cos double angle identities formula
cos(2A)=cos²(A)-sin²(A)
cos(2A)=1-2sin²(A)
cos(2A)=2cos²(A)-1