Respuesta :

Edufirst
Those are too many questions because each answer is very long.

I will do b for you and that should help you to figure out how to do the others.

b) 1 - cos(2x)
    ----------------- = tan(x)
         sin(2x)

1 - [cos^2 (x) - sin^2 (x) ]
---------------------------------- = tan(x)
         2 cos(x)(sin(x)

1 - cos^2(x) + sin^2(x)
----------------------------- = tan(x)
        2cos(x)sin(x)

[1 - cos^2(x) ] + sin^2(x)
-------------------------------- = tan(x)
     2cos(x)sin(x)

sin^2(x) + sin^2 (x)
-------------------------- =  tan(x)
   2cos(x)(sin(x)

   2 sin^2 (x)
--------------------- = tan(x)
2 cos(x)sin(x)

 sin(x)
----------- = tan(x)
 cos(x)

tan(x) = tan(x)


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