Page 94 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - CITS

Assignment

Convert into Degree

1 12 Radian
Convert into Radians
2 78°
3 47°20’

4 52° 36’ 45”
5 25° 38”
Convert into degree, minute and seconds
6 46.723°
7 68.625°
8 0.1269 Radians

9 2.625 Radians
10 3/5 Radians

Trigonometry - Trigonometrical ratios

Dependency
The sides of a triangle bear constant ratios for a given definite value of the angle. That is, increase or decrease
in the length of the sides will not affect the ratio between them unless the angle is changed. These ratios are

BC AC BC AB AB AC
trigonometrical ratios. For the given values of the angle a value of the ratios , , , , and do
AB AB AC BC AC BC
not change even when the sides AB, BC, AC are increased to AB’, BC’ and AC’ or decreased to AB”, BC” and AC”.
For the angle
AC is the hypotenuse

AB is the adjacent side
BC is the opposite side.
The ratios

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CITS : WCS - Electrical - Exercise 7