Solving Trigo Equations

Solve for 0≤x≤2π

2cos²x + cosx = 0

• π/2, 3π/2

• 0, π,2π

• 2π/3, 4π/3

• π/3, 5π/3

Solve for 0≤x≤2π

4cos²x - 2 = 0

• π/3, 5π/3

• π/4, 7π/4

• 3π/4, 5π/4

• π/6, 11π/6

Solve for 0≤x≤2π

sinxtanx = sinx

• π/2, 3π/2

• 3π/4, 7π/4

• 0, π, 2π

• π/4, 5π/4

Solve for 0≤x≤2π

2sin²x - 5sinx + 2 = 0

• π/6, 5π/6

• 7π/6, 11π/6

• π/3, 2π/3

• 4π/3, 5π/3

Solve for 0≤x≤2π

2sin²x - sinx = 0

• 0, π, 2π

• π/2, 3π/2

• π/6, 5π/6

• π/3, 2π/3

Solve for 0≤x≤2π

2sin²x - sinx = 0

• 0, π, 2π

• π/2, 3π/2

• π/6, 5π/6

• π/3, 2π/3

Solve for 0≤x≤2π

tanx = 1

• π/2, π

• π/4, 3π/4

• π/4, 5π/4

• 3π/4, 7π/4

Solve for 0≤x≤2π

3sin²x + sinx - 4 = 0

• 0, π

• π/2

• π/6, 5π/6

• 3π/2

Solve for 0≤x≤2π

2cos²x = cosx + 1

• 2π/3, 4π/3

• π/3, 2π/3

• 0, 2π

• π

Solve for 0≤x≤2π

2cos²x + 3cosx = -1

• 0, 2π

• π

• 2π/3, 4π/3

• π/3, 5π/3