Page 22 - Trigonometry
P. 22
Example 7:
From the diagram on the
left, derive an expression
for the length X in terms of
A, B and C. Also derive an
expression of the angle θ.
From the diagram
2
2
2
= + 1
2
2
2
= + ( + ) 2
From Eq:1
2
2
= √ −
From Eq:2
2
2
+ = √ −
Therefore,
2
2
2
2
√ − + = √ −
Leaving,
2
2
2
2
= √ − − √ − 3
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