Some tips given out to ease learning.

Unit circle (special)

Topic 1.1 - Angle Measure

Topic 1.2 - Trigonometry of right triangles

Topic 1.3 - Trigonometric functions of angles

Topic 1.4.1 - Trigonometric graphs

Topic 1.4.2 - (More) Trigonometric graphs

Topic 1.5 - Inverse trigonometric functions and their graphs

Topic 1.6 - The law of sines

Topic 1.7 - The law of cosines