Помогите решить:
[tex]\frac{cos68-cos22}{sin68-sin22} = ?[/tex]
(cos68-cos22)/(sin68-sin22)
(cos(90-22)-cos(90-68)/(sin68-sin22)
(sin22-sin68)/(sin68-sin22)
-(sin68-sin22)/(sin68-sin22)=-1
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(cos68-cos22)/(sin68-sin22)
(cos(90-22)-cos(90-68)/(sin68-sin22)
(sin22-sin68)/(sin68-sin22)
-(sin68-sin22)/(sin68-sin22)=-1