Tangent graphs
This chapter explores graphs. It covers sketching the tangent graph and solving simple equations such as tan x = 0.2. Before attempting this chapter you must have prior knowledge of basic trigonometry and sine and cosine graphs. What is the [...]
Sine and Cosine Graphs
This chapter explores sine and cosine graphs. It covers sketching sine and cosine graphs, finding angles which have same sine or cosine values, and solving simple equations such as sin x = 0.6 You must have prior knowledge of basic [...]
Trigonometric Equations 2
This chapter explores trigonometric equations. It covers solving harder trigonometric equations using identities. Before attempting this chapter you must have prior knowledge of solving trigonometric equations and must go through trigonometric equations 1 Solving sin x = 1/4 Suppose we [...]
Trigonometric Equations 1
This chapter explores trigonometric equations. This is the first part of this part. The chapter covers solving harder trigonometric equations of the type for example 2x = 0.4 or cos (x – π/3) = √2. Before attempting this lesson you [...]
Special Triangles and Identities
This chapter explores special triangles and identities. It covers identities and finding exact values of sine, cosine, and tangent of common angles. Before attempting this chapter you must have prior knowledge of basic trigonometry and radians. tan T = sin [...]
Radians, Arcs and Areas
This chapter explores radians, arcs, and areas. Before attempting the chapter you must have prior knowledge of finding lengths of arcs and areas of segments using degrees. This chapter explores using radians to measure angles, finding areas of sectors and [...]
Trigonometry Missing Sides
This chapter explores trigonometry missing sides. The objectives for this chapter are being able to use the sine, cosine and the tangent formulae to find the missing sides in a triangle. You may want to go through the ‘Trigonometry missing [...]
Double Angle Formulae
In this chapter we shall be looking at the double angle formulae. We shall explore the double angle formulae for sin2A, cos2A and tan2A and then use them to solve equations and simplify expressions involving multiple angles. You must have [...]
R-Alpha Method
In this entry we shall be exploring the R-alpha method. We shall explore how to use expressions such as Rcos(x+α) and Rsin(x-α) in connection with acosx ± bsinx. Furthermore we shall explore how to solve equations of the form acosx [...]
Cosine Rule
In this chapter we shall be exploring the cosine rule. In trigonometry we can use the cosine rule to find the missing sides and angles in a triangle. You must have some basic knowledge of trigonometry and bearings to appreciate [...]