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Question 18

Given that \(\sin x = \frac{5}{13}\) and \(\sin y = \frac{8}{17}\), where x and y are acute, find \(\cos(x+y)\).

  • A.\(\frac{130}{221}\)
  • B.\(\frac{140}{221}\)
  • C.\(\frac{140}{204}\)
  • D.\(\frac{220}{23}\)
Objective

Question details

Exam body
WAEC
Subject
Further Mathematics
Year
2017
Question no.
#18
Type
Objective
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