Упростите!!!
cos(a+b)+2sinasinb/2sinacosb-sin(a+b)
(sina/sin2a-cosa/cos2a)*cosa-cos7a/sina
sin(a+b)+sin(a-b)/sin(a+b)-sin(a-b)
(sina-cosa)2-1+sin4a/cos2a+cos4a
cos(a+b)+2sinasinb/2sinacosb-sin(a+b)
(sina/sin2a-cosa/cos2a)*cosa-cos7a/sina
sin(a+b)+sin(a-b)/sin(a+b)-sin(a-b)
(sina-cosa)2-1+sin4a/cos2a+cos4a
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