fie
cos1. cos2. cos3.
sinº1 + sin’5 + sin’9 +
cos?1 + cos25 + cos29 +
sin25 + sin?10 + sin’15 +
cos23 + cos26 + cos²9 +
cos 180 = ?
----+sin’89 =?
--+cos 89 = ?
+ sin 90 = ?
--------+cos290 = ?
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fie
cos1. cos2. cos3.
sinº1 + sin’5 + sin’9 +
cos?1 + cos25 + cos29 +
sin25 + sin?10 + sin’15 +
cos23 + cos26 + cos²9 +
cos 180 = ?
----+sin’89 =?
--+cos 89 = ?
+ sin 90 = ?
--------+cos290 = ?
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