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sinθ = 1/2 and cosθ = -√3/2, what is the value of θ?

Mathematics
WAEC 1989

sinθ = 1/2 and cosθ = -√3/2, what is the value of θ?

  • A. 30 0
  • B. 60 0
  • C. 90 o
  • D. 120 o
  • E. 150 o
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Correct Answer: Option E
Explanation

In the 2nd Quadrant; SINE is the only Positive.

Where θ is 30 for the first quadrant and

 150 in the 2nd quadrant which makes COSINE negative 

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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Join your school's WhatsApp group
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts