Trigonometry - Jamb Mathematics Past Questions and Answers

Question 11:

• JAMB 2018

A man stands on a tree 150cm high and sees a boat at an angle of depression of 74°. Find the distance of the boat from the base of the tree.

A. 52cm
B. 43cm
C. 40cm
D. 15cm

Question 12:

• JAMB 2018

Tanθ is positive and Sinθ is negative. In which quadrant does θ lies

A. Second only
B. Third only
C. Fourth only
D. First and third only

Question 13:

• JAMB 2018

Given that Sin (5\(_x\) − 28)\(^o\) = Cos(3\(_x\) − 50)\(^o\), O\(_x\) < 90\(^o\)
Find the value of x

A. 14\(^o\)
B. 21\(^o\)
C. 32\(^o\)
D. 39\(^o\)

Question 14:

• JAMB 2017

Evaluate (\(\sin\)45^o + \(\sin\)3^o ) in surd form

A. \(\frac{\sqrt{3}}{2\sqrt{2}}\)
B. √3 − \(\frac{1}{2}\)
C. \(\frac{1}{2}\)√2
D. 1 + \(\frac{\sqrt{2}}{2}\)

Question 15:

• JAMB 2015

If x + y = 90 simplify (sinx + siny)2−2sinxsiny

A. 1
B. O
C. 2
D. -1