Mathematics 1991 JAMB Past Questions

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One angle of a rhombus is 60^o. The shorter of the two diagonals is 8cm long. Find the length of the longer one.

A. 8\(\sqrt{3}\)
B. \(\frac{16}{\sqrt{3}}\)
C. \(\sqrt{3}\)
D. \(\frac{10}{\sqrt{3}}\)

View Answer & Discuss JAMB 1991

If the exterior angles of a pentagon are x°, (x + 5)°, (x + 10)°, (x + 15)° and (x + 20)°, find x

A. 118^o
B. 72^o
C. 62^o
D. 36^o

View Answer & Discuss (2) JAMB 1991

A flagstaff stands on the top of a vertical tower. A man standing 60 m away from the tower observes that the angles of elevation of the top and bottom of the flagstaff are 64^o and 62^o respectively. Find the length of the flagstaff.

A. 60 (tan 62^o - tan 64^o)
B. 60 (cot 64^o - cot 62^o)
C. 60 (cot 62^o - cot 64^o)
D. 60 (tan 64^o - tan 62^o)

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Simplify \(\cos^{2} x (\sec^{2} x + \sec^{2} x \tan^{2} x)\)

A. tan x
B. tanx secx
C. \(\sec^2 x\)
D. cosec²x

View Answer & Discuss JAMB 1991

If cos x = \(\sqrt{\frac{a}{b}}\) find cosec x

A. \(\frac{b}{\sqrt{b - a}}\)
B. \(\sqrt{\frac{b}{a}}\)
C. \(\sqrt{\frac{b}{b - a}}\)
D. \(\sqrt{\frac{b - a}{a}}\)

View Answer & Discuss (1) JAMB 1991

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Mathematics 1991 JAMB Past Questions

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