A) \[\frac{a\sin (\alpha +\beta )}{\sin (\alpha -\beta )}metre\]
B) \[\frac{a\sin (\alpha +\beta )}{\sin (\beta -\alpha )}metre\]
C) \[\frac{a\sin (\alpha -\beta )}{\sin (\alpha +\beta )}metre\]
D) None of these
Correct Answer: B
Solution :
[b] \[(H+a)cot\,b=(H-a)cot\,a\] using componendo and divdendo \[\Rightarrow H=\frac{a\sin (\alpha +\beta )}{\sin (\beta -\alpha )}\]You need to login to perform this action.
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