NDA_Math_2025_Q47

Question:

What is ÐB equal to?

What is ÐB equal to?

Options:

  • a) 60°
  • b) 105°
  • c) 120°
  • d) 150°
  • a) 60°
  • b) 105°
  • c) 120°
  • d) 150°

correct answer : c)

Explanation:

cos B = ac b
ac
22 2
2
+-
= 25 94 9
25 3
+-
××
= – 1
2
B = 120°

cos B = ac b
ac
22 2
2
+-
= 25 94 9
25 3
+-
××
= – 1
2
B = 120°

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