How to prove trigonometric identities| Grade 12 Maths exam practice question| Steps by step approach

The question on verifying trigonometric identities is typical of grade 12 CAPS maths paper 2 Exam question. When Verifying a trigonometric identity we must show that both sides of a trig identity are mathematically identical. Algebra is used to manipulate the complicated side of the trigonometric identity. However in this tutorial the double angle formulae sin2x= 2sinxcosx and cos2x were used to derive the trigonometric identity.