Page 8 - Ebook Trigonometri_Krisna Hasugian_MESP 2019
P. 8
180
And degrees = 1 radian
Example 1
Convert 60° into radians
60
60 ⋅ (1 degree) = 60 ⋅ = = radian
180 180 180 3
Example 2
Convert (-45°) into radians
−45
-45 ⋅ = = − radian
180 180 4
Example 3
3
Convert radian into degrees
2
180 3 540
3 ⋅ (1 radian) = ⋅ 180 = = 270°
2 2 2
Example 4
7
Convert − radian into degrees
3
7 180 1260
− ⋅ = = 420°
3 3
Before we move on to the next section, let’s take a look at the Unit Circle.
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