This series of booklets is designed to give a thorough grounding in basic trigonometry. A good understanding in this topic is essential for all those people who wish to go on and study Mathematics and other science subjects like, Physics, Chemistry and Engineering. Often the fundamental concepts like these are frequently not completely understood leading to confusion and often dissatisfaction and can result in people giving up on the subject altogether. This is a shame because such confusion can often be attributed to poor teaching or unexplained misconceptions. This series of booklets sets out to explain fully and clearly every step throughout with everything presented in an easy to understand format. All booklets in this series are competitively priced This booklet is Basic Trigonometry module BT2 in the series and contains the following Sine, cosine and Tangent graphs Degree and Radian conversions Signs of the trig ratios Positive and negative trig ratios Addition formulae for sin, cos and tan Double angle identities Sec, cosec and cotan Half angle formulae Factor formulae The sine rule 26 worked examples 30 pages