A) \[\frac{h\tan (\alpha -\beta )}{\tan (\alpha -\beta )-\tan \alpha }\]
B) \[\frac{h\cot (\alpha -\beta )}{\cot (\alpha -\beta )-\cot \alpha }\]
C) \[\frac{\cot (\alpha -\beta )}{\cot (\alpha -\beta )-\cot \alpha }\]
D) None of these
Correct Answer: B
Solution :
\[d=H\cot \alpha \] \[d=(H-h)\cot (\alpha -\beta )\] \[\Rightarrow \] \[H\cot \alpha \] \[=(H-h)\cot (\alpha -\beta )\] or \[H=\frac{h\cot (\alpha -\beta )}{\cot (\alpha -\beta )-\cot \alpha }\].You need to login to perform this action.
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