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" 어케이 "INI+(A|,(sin(2A+B))/(sin A)-2cos(...

" 어케이 "INI+(A|,(sin(2A+B))/(sin A)-2cos(A+B)=(sin B)/(sin A)

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Prove the following identities: (sin (2A + B))/sin A - 2 cos (A + B) = sin B/sin A

Show that (1+sin A)/(cos A)+(cos B)/(1-sin B)=(2sin A-2sin B)/(sin(A-B)+cos A-cos B)

(sin A-sin B)/(cos B-cos A)=cot((A+B)/(2))

(sin(A+3B)+sin(3A+B))/(sin2A+sin2B)=2cos(A+B)

(sin(A+3B)+sin(3A+B))/(sin2A+sin2B)=2cos(A+B)

Prove that (1 + sin A) / (cos A) + (cos B) / (1-sin B) = (2sin A-2sin B) / (sin (AB) + cos A-cos B)

sin ^ (2) A + sin ^ (2) (AB) -2sin A cos B sin (AB) = sin ^ (2) B

(2sin (AC) cos C-sin (A-2C)) / (2sin (BC) cos C-sin (B-2C)) = (sin A) / (sin B)

(2sin (AC) cos C-sin (A-2C)) / (2sin (BC) cos C-sin (B-2C)) = (sin A) / (sin B)