Using the law of cosines, a=2.2 use your answer above to find m< b, to the nearest degree. m< b=__

81°

Explanation:

1) Law of cosines:

In a triangle with sides a, b, c whose opposite angles are, respectively, A, B and C, the law of cosines states:

b² = a² + c² - 2 (a)(c) cos (B)

2) In the triangle of the figure you have

b = 4.0
B = ?
a = 2.2
c = 3.7

⇒ (4.0)² = (2.2)² + (3.7)² - 2 (2.2) (3.7) cos(B)

⇒ 16 = 4.84 + 13.69 - 16.28cos(B)

⇒ 16.28 cos(B) = 4.84 + 13.69 - 16 = 2.53

⇒ cos(B) = 2.53 / 16.28

⇒ X = arccos(2.53 / 16.28 ) = 81.06° ≈ 81°

81

Step-by-step explanation:

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.