Cosine Calculator

• Cosine is the x-coordinate of the point on the unit circle at angle θ, so it always stays in the range -1 to 1.
• Here sin(θ) = 0.866025 and tan(θ) = 1.73205081, showing all three primary trig ratios for this angle.
• The angle lands in quadrant I (0° to 90°), where cosine is positive.
• Cosine is an even function: cos(-θ) = cos(θ), so the sign of the angle does not change the result.

Next stepUse the general solution field to find every angle that gives this same cosine value.