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nibori07
@nibori07
July 2022
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(1 - cos 2a + sin 2a) / (cos a - sin (2пи - a)) =
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djpinks
(1-cos 2a + sin 2a) / (cos a - sin (2pi - a)) = 2 * sina
1) Разберем сначала верхнее
1-
+
+ 2*sina*cosa =
+
+ 2*sina*cosa = 2 *
+ 2*sina*cosa =
2*sina*(sina + cosa)
2) Разберем нижнее
cos a - sin (2pi - a) = cosa - sin(-a) = cosa + sina
3) Теперь все вместе
=
= 2 * sina
7 votes
Thanks 8
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Answers & Comments
1) Разберем сначала верхнее
1- + + 2*sina*cosa = + + 2*sina*cosa = 2 * + 2*sina*cosa =
2*sina*(sina + cosa)
2) Разберем нижнее
cos a - sin (2pi - a) = cosa - sin(-a) = cosa + sina
3) Теперь все вместе
= = 2 * sina