1.

what is the formula of (cos A-cosB)

Answer» cot A-cotB=cosA/sinA - cos B/sinB=(sinBcosA-cosBsinA) /sinAsinB=sin(B-A) / sinA sinB
Sin(B-A)/SinASinB
-2sina+b/2*sina-b/2
sorru sorry its not cos its (cotA-cotB)


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