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6. Which of the following given is applicable by the formula a² = b²+c²-2bc cos A?
a = 18cm B = 59⁰ A = 48⁰ C = 42⁰
b. A = 70⁰ c = 8.4 cm
c. c = 17cm A = 640
d. B = 52⁰ a = 18cm c = 25cm if a = 15cm​

Sagot :

Raelliannacgo

Answer:

D.

Step-by-step explanation:

For B = 52°, a = 18 cm, c = 25cm

Then, b² = a+ c² - 2accosB

= 18² + 25² - 2 x 18x 25 x cos 52°

Eventually, we can solve for b..

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