squareroot cos 3x 1 0 15 random x or degree theta Coast no

squareroot cos 3x - 1 = 0 #15 random (x) or degree (theta) Coast non negate sin^3 theta = -cos 2 theta #16 2 squareroot 3 sin x/2 = 3

13) sqrt2cos3x -1 =0

cos3x = 1/sqrt2

3x = cos^-1(1/sqrt2)

general solution:

3x = pi/4+2kpi , 3pi/4 +2kpi

x = (pi+6k*pi)/12 , (3pi + 6kpi)/12 where k is an integer ; k=0, 1 , 2 ..

16) 2sqrt3sin(x/2) = 3

sin(x/2) = sqrt3/2

x/2 = pi/3 +2kpi , pi-pi/3 +2kpi

x= (2pi + 12kpi)/3 where k is an integer ; k=0, 1 , 2 ...

x/2 = 2pi/3 +2kpi

x= 4pi/3 +4k*pi

x = ( 4pi +12k*pi)/3 where k is an integer ; k=0 ,1 , 2 ....