Evaluating Trigonometric Functions (Precalculus Review 3) September 10th, 2015.

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