Evaluating Trigonometric Functions

(Precalculus Review 3)

Evaluating Trigonometric Functions

(Precalculus Review 3)

September 10th, 2015September 10th, 2015

I. SOH CAH TOA

II. Special Right Triangles

*To make things simple, use x=1 when evaluating trig ratios.

III. Radian Measure

Ex. 1: Evaluate each.

*To remember which functions are positive in each quadrant:

Quad IAll

(all)

Quad IIStudents(sin)

Quad IIITake(tan)

Quad IVCalculus(cos)

IV. Quadrant Angles

*Use points on the unit circle to evaluate trig functions for quadrant angles.

Ex. 2: Evaluate each.

V. Trigonometric identitiesReciprocal Identities:

Quotient Identities:

Pythagorean Identities:

Double Angle Identity:

VI. Graphs of Trigonometric Functions

Vertical Asymptotes:

D: All realnumbers except