NDA Government Jobs Exams

If 




+
−
2
1
1 a
a 2 sin + sin–1 




1+ b2
2b = 2 tan–1x, then x is equal to

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NDA Other Question

In any triangle ABC, a = 18, b = 24 and c = 30. Then what is sin C equal to ? A man walks 10m towards a lamp post and notices that the angle of elevation of the top of the post increases
from 30º to 45º. The height of the lamp post is