Finding the expression of the original function Given that G (cosx) = TaNx, find GX. My method is to deform TaNx, and then get GX = radical 1-x ^ (2) / radical x, but the teacher was wrong,

Finding the expression of the original function Given that G (cosx) = TaNx, find GX. My method is to deform TaNx, and then get GX = radical 1-x ^ (2) / radical x, but the teacher was wrong,

In fact, tanxtanx = SiNx / cosx1 is expressed by cosx. When x is one or two quadrants, SiNx = √ (1-cos ^ 2 (x)) TaNx = √ (1-cos ^ 2 (x)) / cosxf (x) = √ (1-x ^ 2) / x2. When x is three or four quadrants, SiNx = - √ (1-cos ^ 2 (x)) TaNx = - √ (1-cos ^ 2 (x)) / cosxf (x) = - √ (...)