TY  - BOOK
AU  - Delbourgo, Roger
TI  - Trigonometry: Notes, Problems and Exercises
SN  - 9789813207103
U1  - 516.24 
PY  - 2017///
CY  - New Jersey
PB  - World Scientific Publishing Co. Pte. Ltd.
KW  - Trigonometry
N1  - 1.	Pythagoras' Theorem
2.	Degrees versus Radians
3.	Cartesian and Polar Coordinates. The Sine and Cosine Ratios
4.	The Cosine Rule
5.	Stewart's Theorem. Medians and the Centroid G
6.	The Circumcentre, O. The Sine Rule
7.	Area. Hero's Formula
8.	The Tangent Ratio
9.	Some Very Special Angles
10.	Cosecant, Secant, Cotangent. Proving Simple Identities
11.	Further Problems- Heights & Distances
12.	The Factorisation Formulae & Napier's Tangent Rule
13.	Addition Formulae for Sines & Cosines
14.	Addition Formulae for Tangents
15.	Further Half-Angle Formulae
16.	Solving the Equation a sin θ + b cos θ = c
17.	Ptolemy's Theorem
18.	Morley's Trisector Theorem
19.	Cyclic Quadrilaterals and Brahmagupta's Formula
20.	Graphs of the Six Trigonometrical Ratios
21.	Graphs of the Six Inverse Trigonometrical Ratios
22.	Addition Formulae for Inverse Functions & Rutherford's and Machin's Formulae
23.	Solving Simultaneous Equations
24.	The Problem of Elimination
25.	Angle Bisectors and the Incentre, I
26.	Altitudes, the Orthocentre, H and the Pedal Triangle
27.	The Distances OI, OH, IH
28.	External Angle Bisectors and the Ex-centres Ia, Ib, Ic
29.	The Distances AIa, OIa, HIa
30.	The Nine-Point Centre, N. The Feuerbach Circle
31.	The Distances IG, IN
32.	Napoleon Circles and the Format Point
33.	Small Angles in Radians
34.	Euler's Product. A Limit for π
35.	Angle of Dip and Distance to Horizon
36.	A Series for π
37.	Stricter Inequalities. More Limits
ER  -