1.

Find the height (in metres) of the building if the sun’s shadow increases by 10 m when the angle of elevation of the sun decreases from 60° to 45°.

A. 10√3/(√3 + 1)
B. 10/(√3 - 1)
C. 10√3
D. 10√3/(√3 - 1)
Answer» E.


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