Maths Class 11 Chapter 3. Trignometric functions | Page 5

Trigonometric Ratios( Acute Angles)
Mantra: Pandit Badri Prasad.. Hare hare Bol.
Using this logic, In right ΔABC sine of ∠ A = P / H = BC / AC cosine of ∠ A = B / H = AB / AC tangent of ∠ A = P / B = BC / AB cosecant of ∠ A = 1 / sine of A = AC / BC secant of ∠ A = 1 / cosine of A = AC / AB cotangent of ∠ A = 1 / tangent of A = AB / BC