Mathematics
JAMB 1983
PQRS is a desk of dimensions 2m x 0.8 which is inclined at 30
o to the horizontal. Find the inclination of the diagonal PR to the horizontal
-
A.
30o 35'
-
B.
30o 32'
-
C.
15o 36'
-
D.
10o
-
E.
10o 42'
Correct Answer: Option E
Explanation
tan\(\theta\) = \(\frac{0.8}{2}\) = (0.4)
\(\theta\) = tan-1(0.4)
From the diagram, the inclination of the diagonal PR to the horizontal is 10o 42'
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