упростите выражение(tg(a-p/2)-ctg(p-a)+cos(a-3/2p)):sin(p+a),р-это пи,а-альфа.
1)1
2)tga
3)ctga
4)-1
5)-tga
(tan(alpha-pi/2)-cot(pi-alpha)+cos(alpha-3/2 pi))/(sin(pi+alpha))= 1
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(tan(alpha-pi/2)-cot(pi-alpha)+cos(alpha-3/2 pi))/(sin(pi+alpha))= 1