What is the period of the standard sine function, sin(x)?

Which trigonometric function is equal to the ratio of the opposite side to the hypotenuse in a right triangle?

What is the value of cos(π/2)?

Which of the following is the reciprocal of the sine function?

Simplify: sin²(x) + cos²(x)

What is the domain of the tangent function, tan(x)?

Solve for x: sin(x) = 1, where 0 ≤ x ≤ 2π

Which quadrant does an angle of 240 degrees lie in?

If tan(θ) = 1, what is the possible value of θ in radians (0 ≤ θ ≤ 2π)?

What is the range of the cosine function?