Trigonometric Ratio

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Emotional Hygiene

luonut Hannah Page

ABOUT MYSELF

luonut MUHAMMAD KHAIRUL FAHMI BIN MOHD SALLEH

TRIGONOMETRIA

luonut Carme Boronat

Present perfect simple and present perfect continuous

luonut Miguel Jeosue Quinde Zambrano

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