Properties of the Trigonometric Function
نویسندگان
چکیده
(1) If p ≥ 0 and r ≥ 0, then p+ r ≥ 2 ·√p · r. (2) sin is increasing on ]0, 2 [. (3) sin is decreasing on ]2 ,π[. (4) cos is decreasing on ]0, 2 [. (5) cos is decreasing on ]2 ,π[. (6) sin is decreasing on ]π, 2 ·π[. (7) sin is increasing on ] 3 2 ·π,2 ·π[. (8) cos is increasing on ]π, 2 ·π[. (9) cos is increasing on ] 3 2 ·π,2 ·π[. (10) sin(t1) = sin(2 ·π ·n+ t1). (11) cos(t1) = cos(2 ·π ·n+ t1).
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