What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.1.5.1Trig graphs• sketch and use graphs of the sine, cosine and tangent functions (for angles of any size, and using either degrees or radians) Including e.g. y = 3 sin x, y = 1 - cos 2x,.tany x 4 1 r= +`jSyllabus objective1.5.2Exact trig values• use the exact values of the sine, cosine and tangent of 30°, 45°, 60°, and related angles e.g.,coss in1503 22 1 4 3 2 1c - r==.Syllabus objective1.5.3Inverse trig notation• use the notations sin-1x, cos-1x, tan-1x to denote the principal values of the inverse trigonometric relations No specialised knowledge of these functions is required, but understanding of them as examples of inverse functions is expected.Syllabus objective1.5.4Trig identities• use the identities cos sin tan/i i i and sinc os 122 /ii+ e.g. in proving identities, simplifying expressions and solving equations.Syllabus objective1.5.5Trig equations• find all the solutions of simple trigonometrical equations lying in a specified interval (general forms of solution are not included). e.g. solve 3sin 21 0x += for x<<rr-, 3sin 5cos 102 =ii-- for 0° ⩽ i ⩽ 360°.Syllabus objective