CLASS-9
TRIGONOMETRICAL RATIOS - T- Ratios
for C
T-Ratios for ∠C -
Here, Base = BC, Perpendicular = AB, and Hypotenuse = AC
Perpendicular AB
(i) sin C = ----------------- = --------
Hypotenuse AC
Base BC
(ii) cos C = -------------- = --------
Hypotenuse AC
Perpendicular AB
(iii) tan C = ----------------- = --------
Base BC
1 Hypotenuse AC
(iv) cosec C = ----------- = ---------------- = -------
sin C Perpendicular AB
1 Hypotenuse AC
(v) sec C = ---------- = --------------- = --------
cos C Base BC
1 Base BC
(vi) cot C = ---------- = --------------- = ------
tan C Perpendicular AB