Hi..please help and teach me how to do these problems and please show work so I can learn! Please
1) evaluate if sin a=2/radical5 ; 0<a<pi/2
the problem is sin 2a
#2-3 solve for each equation:
2)2sinx+radical 3 = 0
3)radical2 cos x-1 =0
#4 solve the equation on the time interval 0<x<2pi
4)4sin^2x - 1 =0
the answer for 1 is 4/5
the answers for 2 is x=4/3pi +2npi or x=5pi/3+2npi
the answers for 3 is x=pi/4+2npi or x=7pi/4+2npi
the answers for 4 is pi/6, 5pi/6, 7pi/6 and etc
1) evaluate if sin a=2/radical5 ; 0<a<pi/2
the problem is sin 2a
#2-3 solve for each equation:
2)2sinx+radical 3 = 0
3)radical2 cos x-1 =0
#4 solve the equation on the time interval 0<x<2pi
4)4sin^2x - 1 =0
the answer for 1 is 4/5
the answers for 2 is x=4/3pi +2npi or x=5pi/3+2npi
the answers for 3 is x=pi/4+2npi or x=7pi/4+2npi
the answers for 4 is pi/6, 5pi/6, 7pi/6 and etc