Surface area of pyramid 4
Very easy
Execution time limit is 1 second
Runtime memory usage limit is 64 megabytes
Find the total surface area of the right square pyramid if the lateral edge b forms an angle α with the plane of the base.
Input
In the only flow through the gap two integers: the lateral edge of b (0 < b ≤ 100) and its angle α with the base plane in degrees (0 < α ≤ 90).
Output
The only number - the desired area. Result output to three decimal.
Examples
Input #1
Answer #1
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