Solve combined variation using constant variation if x varies directly as y and z and inversly aa swuare of r, and x=12 when y=3, z=6 and r=3, find x when y=2,z=20,and r=4

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.