Question

Mohon bantuan kakak yang baik
4sin x - 2cosec x = 0, 0≤x≤360

Answer 1

4Sinx = 2Cosecx
2sinx = 1/Sinx
2Sin²x = 1
Sin² x = 1/2
Sinx = +-√1/2 = +-1/2 √2
Sin x = 1/2 √2          dan      Sin x = -1/2 √2
     x = 45' , 135'                         x = 225'  , 315'
HP{45' , 135' , 225' , 315'}