If the angles of a triangle are in the ratio A: B: C = 1: 2: 3 and the – McqOptions

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1.	If the angles of a triangle are in the ratio A: B: C = 1: 2: 3 and the circum-radius is 10 cm. Find the value of cos B?
A.	1
B.	1 / 2
C.	√3 / 2
D.	None of these
Answer» C. √3 / 2

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