1 Answer

Elmar Brauch · Answer 1 · 2024-03-08T06:14:04+0000

Answer:

$C = 16.8954 ^\circ$

Explanation:

Law of Sines

The rule of sines states: If a, b, and c are, respectively, the lengths of a triangle's legs on either side of angles A, B, and C:

$(a)/(\sin A) = (b)/(\sin B) = (c)/(\sin C)$

Given:

$C = \sin^(-1) \left[ \frac {c \sin B}{b}\right]$

$= \sin^(-1)\left[\frac {{13}{\sin}(28 ^\circ)} {21}\right]$

$= 16.8954 ^\circ$

Thanks.

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