3.3 Law Of Sines
In triangle ABC, seg is
the altitude in each fig.
\ D ADC and D
BCD are right triangles. Thus
sin A =
\ h = b sin A in fig.23A
sin ( p - B) = sin B =
\ h = a sin B.
In follows that from fig.23.B
\ b sin A = h = a sin B
The Law Of Tangent
These results are also known as "Napier's Analogy."
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