Asked by MW
In triangle ABC, b=14, c=15, and cos a= 3/5.
Find
a)side a
b) Sin B
Help please?
Find
a)side a
b) Sin B
Help please?
Answers
Answered by
Reiny
In this notation, small letters are usually used to represent sides, and capital letters to indicate the angles at the vertex,
so yours : b=14, c=15, cos A = 3/5
direct application of the cosine law
a^2 = 14^2 + 15^2 - 2(14)(15)cos A
= ....
once you have a
use the Sine Law to find angle B
so yours : b=14, c=15, cos A = 3/5
direct application of the cosine law
a^2 = 14^2 + 15^2 - 2(14)(15)cos A
= ....
once you have a
use the Sine Law to find angle B
Answered by
MW
ok. I have side A.
How do you find angle B?
How do you find angle B?
Answered by
Damon
sin B/b = sin A/a
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