You might find following videos helpful related to this section:
4A Trigonometric Ratios (1 of 3)
Explains how to label the sides of a triangle. Also explains how to convert between angles into degree, minutes and seconds.
4A Trigonometric Ratios (2 of 3)
Explains how to calculate sides on a right-angled triangle using trigonometric ratios. Makes reference to the SOHCAHTOA acronym.
4A Trigonometric Ratios (3 of 3)
Explains how to calculate an angle using trigonometric ratios on a right-angled triangle. Refers to the SOHCAHTOA acronym.
4B Angles of Elevation and Depression (1 of 2)
Explains the difference between angles of elevation and depression and then completes an example involving an angle of elevation.
4B Angles of Elevation and Depression (2 of 2)
Explains how to solve a problem involving an angle of depression.
There are broadly 3 types of questions you can expect in exam:
– 4.1.1 Exam Question Type 1
– 4.1.2 Exam Question Type 2
– 4.1.3 Exam Question Type 3
Study notes of this section and other resources can be accessed here:
– 4.1.4 Study Notes & Resources