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JAMB - Mathematics (1983 - No. 42)

PQRS is a desk of dimensions 2m x 0.8 which is inclined at 30o to the horizontal. Find the inclination of the diagonal PR to the horizontal
30o 35'
30o 32'
15o 36'
10o
10o 42'

स्पष्टीकरण

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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