0.65= 12 1) ๐ฅ 0.32= ๐ฅ 2) - navimath | Grant HS Math Deptย ยท Section 9-1: Solving Right...
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Transcript of 0.65= 12 1) ๐ฅ 0.32= ๐ฅ 2) - navimath | Grant HS Math Deptย ยท Section 9-1: Solving Right...
Section 9-1: Solving Right Triangles
Objective: To use trigonometry to find unknown sides or angles of a
right triangle.
These are the general formulas you will
need in order to find any unknown angle or
side in a right triangle.
Solution:
To find the value of b, use either tan 28โฐ or cot 28โฐ.
Using tan 28โฐ:
๐ก๐๐๐ =๐๐๐๐๐ ๐๐ก๐
๐๐๐๐๐๐๐๐ก
Using cot 28โฐ:
40
tan 28โฐโ 75.2
B
=
๐ก๐๐28ยฐ =40
๐
๐๐๐ ๐ =๐๐๐๐๐๐๐๐ก
โ๐ฆ๐๐๐ก๐๐๐ข๐ ๐
40๐๐๐ 28ยฐ โ 75.2
๐๐๐ 28ยฐ =๐
40
Angles of Elevation and Depression
The angle of elevation of an object as seen by an observer is the angle between the horizontal and the line from the object to the observer's eye (the line of sight).
Angles of Elevation and Depression
If the object is below the level of the observer, then the angle between the horizontal and the observer's line of sight is called the angle of depression.