Math / TrigonometryQuestionEvaluate cos(a−b)\cos (a-b)cos(a−b) given that cosa=45\cos a=\frac{4}{5}cosa=54 with 0<a<π20<a<\frac{\pi}{2}0<a<2π and sinb=−1517\sin b=-\frac{15}{17}sinb=−1715 with 3π2<b<2π\frac{3 \pi}{2}<b<2 \pi23π<b<2π. cos(a−b)=\cos (a-b)=cos(a−b)= □\square□Studdy Solutioncos(a−b)=−1385\cos(a-b) = -\frac{13}{85}cos(a−b)=−8513View Full Solution - FreeWas this helpful?
