|
|
вернуться в форумHint For accuracy of calculations use power-reduction formulas /* 2 * sin ^ 2 (a) = 1 - cos(2a) */ in the formula that calculates chords long. Re: Hint 2 * R * sin( a / 2 ) = sqrt ( 2 R R 2 sin^2 ( a / 2 ) ) = sqrt ( 2 R R ( 1 - cos ( a ) ) = sqrt ( 2 R R - 2 R R cos ( a ) ) = sqrt ( R^2 + R^2 + 2 * R * R * cos ( a ) ) |
|
|