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Trigonometry - Finding Angles

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by

Mr Mattock

on 29 November 2018

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Transcript of Trigonometry - Finding Angles

Trigonometry - Finding Angles
Starter
Write down a trigonometric equation for these two triangles
Solving for angles
Solving for angles
L.O. - Solve trigonometric equations to find angles.
6 cm
a
b
10 cm
17 cm
5 cm
Starter
Write down a trigonometric equation for these two triangles
6 cm
a
b
10 cm
17 cm
5 cm
tan a = =
10
6
5
3
cos b =
5
17
6 cm
10 cm
Solving for angles
6 cm
10 cm
tan a =
5
3
a = tan
5
3
-1
a = 59.03624347
a = 59
o
b
17 cm
5 cm
cos b =
5
17
b = cos
5
17
-1
b = 72.89536482
b = 72.9
o
Solving for angles
b
17 cm
5 cm
Main Activity
Complete the finding angles trig sheet
Main Activity
Complete the finding angles trig sheet
8

9.5

67
o
o
o
Key
Examples

Activities
Activity