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4. If triangle ABC has the following measurements, find the measure of side c:
a = 5
B = 7
C = 42 degrees

4 If Triangle ABC Has The Following Measurements Find The Measure Of Side C A 5 B 7 C 42 Degrees class=

Sagot :

Sqdancefanidn

9514 1404 393

Answer:

  c ≈ 4.69

Step-by-step explanation:

The Law of Cosines is used for the purpose. It tells you ...

  c² = a² +b² -2ab·cos(C)

  c² = 5² +7² -2·5·7·cos(42°) ≈ 21.9799

  c ≈ √21.9799 ≈ 4.688

The measure of side c is about 4.69 units.

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