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Mathematics 20 Online
OpenStudy (anonymous):

Write the expression as either the sine, cosine, or tangent of a single angle.

OpenStudy (anonymous):

cosAcosB-sinAsinB=cos(A+B) thus the answer would be cos(7y+3y)=cos10y generally..the expressions for sine=opposite side/hypotenuse cosine=adjacent side/hypotenuse tangent=opposite/adjacent

OpenStudy (anonymous):

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