Find the exact value of the expressions cosine left parenthesis alpha plus beta right parenthesiscos(α+β), sine left parenthesis alpha plus beta right parenthesissin(α+β) and tangent left parenthesis alpha plus beta right parenthesistan(α+β) under the following conditions: cosine left parenthesis alpha right parenthesis equals startfraction 12 over 13 endfractioncos(α)= 12 13, alphaα lies in quadrant iv, and sine left parenthesis beta right parenthesis equals startfraction negative 6 over 13 endfractionsin(β)= −6 13, betaβ lies in quadrant iii. what is tangent (alpha +beta)i need to find answer to tan(alpha + beta) when sin (alpha+beta) =5square root 133 - 72/169 and cos(alpha+beta) = -12square root 133 + 30/169. cos 12/13 quad 4; sin -6/13 quad 3