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Secant Inverse of One
The angle whose secant is 1, which is 0 degrees.
Cosecant Inverse of Two
The angle whose cosecant is 2, which corresponds to sine being 1/2, or 30 degrees (π/6).
Cotangent Inverse of -√3
Equivalent to tangent inverse of -1/√3, resulting in 5π/6 in the second quadrant.
Pythagorean Theorem
A theorem used to find the lengths of sides in a right triangle, given by a² + b² = c².
Cosine of 0 degrees
Cosine of 0 degrees is 1.
Inverses of Trigonometric Functions
Functions that return the angle whose trigonometric function is a given value. Example: sin⁻¹, cos⁻¹, tan⁻¹.
Quadrants
The four sections of the Cartesian plane, used to determine the signs of trigonometric functions.
Hypotenuse
The longest side of a right triangle, opposite the right angle.
Tangent Inverse
The function that gives the angle whose tangent is a given value.
Quadrant II
The section of the Cartesian plane where x is negative and y is positive.
Trigonometric Ratios
Ratios derived from the lengths of sides of a right triangle (sine, cosine, tangent).
Cosecant
The reciprocal of sine; cosecant = 1/sine.
Cotangent
The reciprocal of tangent; cotangent = 1/tangent.
Angle Measurement
The angle of a triangle can be determined using trigonometric functions based on the side lengths.
