Question

solve for x: 4 sin2x - sec 60degree = 1

Answer 1

the above picture has the solution

Answer 2

Answer : 60⁰

Solution :

• 4 sin² x - sec 60⁰ = 1
• 4 sin² x - 2 ( value of sec 60⁰ ) = 1
• 4 sin² x = 1 + 2
• 4 sin² x = 3
• sin² x = 3/4
• sin x = √(3/4)
• sin x = √3/2
• x = 60⁰ ( value of sin √3/2 )