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If sin θ = \(\frac{4}{5}\) where 0° ∠ θ ∠ 90º, what is the value...

Mathematics
NECO 2001

If sin θ = \(\frac{4}{5}\) where 0° ∠ θ ∠ 90º, what is the value of cos θ + tan θ?

  • A. \(\frac{14}{15}\)
  • B. \(\frac{29}{15}\)
  • C. \(\frac{13}{8}\)
  • D. \(\frac{144}{15}\)
  • E. \(\frac{24}{5}\)
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Correct Answer: Option B
Explanation

0° ∠ θ ∠ 90º, 

From the diagram above, the adjacent by Pythagoras theorem = 3

Cos θ = \(\frac{\text{adj}}{\text{hyp}}\) = \(\frac{3}{5}\)

Tan θ = \(\frac{\text{opp}}{\text{adj}}\) = \(\frac{4}{3}\)

cos θ + tan θ =  \(\frac{3}{5}\) + \(\frac{4}{3}\) = \(\frac{29}{15}\)

 


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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