Trigonometric Ratio

Ver más

Mentefacto "Feedback"

por ANGIE ACHICANOY

ABOUT MYSELF

por MUHAMMAD KHAIRUL FAHMI BIN MOHD SALLEH

English verbs

por kirill zukov

Emotional Hygiene

por Hannah Page

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