How did 15 degree come in the following equation. http://dc474.4shared.com/download/8_...55515-f1b2071a
thanks in advance
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Originally Posted by SiddS How did 15 degree come in the following equation. Untitled.png - 4shared.com - photo sharing - download image
thanks in advance 1. It is not 15 but -15 degrees.
2. Because this involves you need to think in terms of 30 or 60 degrees, so look up the tangent half angle formula.
Using the formula:
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