Everything Maths Grade 10

Step 2: Use your calculator to solve for

To solve for, you will need to use the inverse tangent function on your calculator. This works backwards by
using the ratio of the sides to determine the angle which resulted in that ratio.

Press SHIFT tan 50 ÷ 100 ) = 26,56505...26,6

Step 3: Write the final answer

26,6°

Exercise 5 – 5:

Determine in the following right-angled triangles:

1.

9

4

2.

13

7 , 5

3.

1 , 7 2 , 2

4.

4 , 5

9 , 1

Chapter 5. Trigonometry 127