tgB=sinB/cosBcosB=sinA=5√34/34sinB=√(1-cos^2(B))=√(1-25/34)=√(9/34)=3√34/34tgB=3√34/34 * 34/5√34 = 3/5=0.6
tgB=tg(90-A)=ctgA=cosA/sinA=sqrt(1-sin^2A)/sinA=sqrt(1-25/34)*34/5*sqrt(34)=3/5
