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posted by .

Third time is the charm? I'll try again.

Could someone show me how,

(- sin (x/2) /( 2 sin (x/2) + cos (x/2))

is an alternate representation for,

1 / ( 4 tan (x/2) + 2 )
This doesn't require the solving of any equations. For example, ( same concept for what I need done above )

1st representation: (sec x )/(tan^2 x)

Since, sec x = 1/cos x and
tan x = sin x /cos x

the 1st representation can be converted to,
(cos x )/(sin^2 x )

Hope this clears things up?

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