Tg 180 A Ctg 90 A
By Daniel Johnston |
Tg 180 A Ctg 90 A
sin (90a) cos (180a) + tg (180a) ctg (270 + a)? 3
Thing + thing a + then = 2 cos a
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sin (90a) cos (180a) + tg (180a) ctg (270 + a)? 3
Thing + thing a + then = 2 cos a
