Trignometric Functions – Notes
Quadrilateral Angles: Angles that are integral multiples of are called quadrilateral angles.
- Cos2q + sin2q = 1
- Sec2 q = 1 + tan2q
- Cosec2 q = 1 + cot2 q
Sin (2n + q) = sin q, where n is any integer.
Cos (2 n + q) = cos q, where n is any integer.
Sin q = 0 q = n , where n is any integer.
Cos q = 0 Þ q = (2n + 1) , where n is any integer