Trigonometry - Jamb Mathematics Past Questions and Answers

Question 76:

• JAMB 2007

A man 40 m from the foot of a tower observes the angle of elevation of the tower to be 30^o. Determine the height of the tower.

A. \(\frac{40\sqrt{3}}{3}m\)
B. 20 m
C. 40√3 m
D. 40 m

Question 77:

• JAMB 2007

Find the value of \(\frac{tan 60^o - tan 30^o}{tan 60^o + tan 30^o}\)

A. \(\frac{4}{\sqrt{3}}\)
B. \(\frac{2}{\sqrt{3}}\)
C. 1
D. \(\frac{1}{2}\)

Question 78:

• JAMB 2008

If sinθ = ³/₅. Find Tanθ

A. ³/₄
B. ³/₅
C. ²/₅
D. ¹/₄

Question 79:

• JAMB 2009

If the hypotenuse of a right angle-triangle isosceles triangle is 2cm. What is the area of the triangle?

A. ¹/_√2 cm²
B. 1 cm²
C. √2 cm²
D. 2√2 cm²

Question 80:

• JAMB 2009

Find the value of sin 45^o - cos 30^o

A. \(\frac{2+\sqrt{3}}{4}\)
B. \(\frac{\sqrt{2}+\sqrt{3}}{4}\)
C. \(\frac{\sqrt{2}+\sqrt{3}}{2}\)
D. \(\frac{\sqrt{2}-\sqrt{3}}{2}\)