I was trying to do a^2=25^2+30^2-2(25)(30)cos77 But the calculator won't let me input the equation into the system or it doesn't want to solve it. HELP !
I was trying to do a^2=25^2+30^2-2(25)(30)cos77 But the calculator won't let me input the equation into the system or it doesn't want to solve it. HELP !
