Circular Functions and Trigonometry

Conversion

Solution of triangles

Graph of trigo function

y = sin x

Special angle

Trigo identities

Pythagorean Identity

Double angles

Negative angles

θ is negative when the angle rotates in a
clockwise direction (I-IV-III-II)

cos (-θ) is positive because cos θ = x
In Quadrant IV, x is positive.

y= cos x

y= tan x

Sign at 4 Quadrant



sin θ, cos θ and tan θ value is the same with their corresponding acute angle

Radians, arcs and sectors