Trigonometric Ratio

Honelako gehiago

Project #3 Math 252

by Michaela George

Differential Equations and Linear Algebra

by Caleb Guanzon

Fundamentals of Geometry for Elementary School Teachers

by Hannah Schweiter

VM2666018

by Diana Herrera

Trigonometric Ratio

The CAST rule

C Quadrant

cosθ and secθ will be positive

A Quadrant

All trigonometric ratios and their corresponding reciprocal functions are positive.

T Quadrant

tanθ and cotθ will be positive

S Quadrant

sinθ and cscθ will be positive.

The special triangles

How to sketch an angle

Terminal Arm: the ray the defines the end of the angle

Initial Arm: the ray that defines the beginning of the angle.

An example

tan(11π/6)= -tan(π/6)= -1/√3

sec (5π/4) = -sec(π/4)= -√2