Functions (trigonometric)

Find the general solution of the equation.

• π/6; 11π/6

• π/6

• 11π/6

• π/3; 11π/3

Solve for x.

• 24.20
• 4.92
• 290.4
• 29.75

What is the value of cos⁻¹[cos(3π/7)]?

• 3π/7

• π/7

• 2π/7

• 4π/7

What is the correct expression for the inverse of the cosine function?

• cos⁻¹(x) means x = cosy.

• cos⁻¹(x) means x = cotx.

• cos⁻¹(x) means x = sinx.

• cos⁻¹(x) means x = tanx.

tan(cos^-1(-1))=

• undefined

• 0

• ½

• 1

Solve for 0≤x≤2π

2cos²x + cosx = 0

• π/2, 3π/2

• 0, π,2π

• 2π/3, 4π/3

• π/3, 5π/3

Solve [0,2π] 4cos²x - 7cosx - 2 = 0

• 1.82, 4.46

• 1.23, 3.87

• 2.07, 5.73

• no solution

• (0,3)

• (2,3)

• (3,3)

• (4,3)

• (6,3)

300°

• 3π/4

• 2π/3

• 3π/2

• 5π/3

Solve sinθ = ½

• θ = 30, 210

• θ = 30, 150

• θ = 150, 210

• θ = 210, 330