Proving trig equations

[rain]

I'm having some problems calculating the below problem - they don't equal to each other! Someone please help?

tan^2θ -1/tan^2θ = 1-2cos^2θ /cos^θ (sin^2θ )


Its mostly the left side I'm having troubles with... here is my last step so far, if someone could point me to the right direction, that'd be great!

1-4sin^2θ cos^2θ /sin^θ cos^2θ

Thanks to anyone who can help me solve this!

 

[srmichael]

I'm having some problems calculating the below problem - they don't equal to each other! Someone please help?

tan^2θ -1/tan^2θ = 1-2cos^2θ /cos^θ (sin^2θ )


Its mostly the left side I'm having troubles with... here is my last step so far, if someone could point me to the right direction, that'd be great!

1-4sin^2θ cos^2θ /sin^θ cos^2θ

Thanks to anyone who can help me solve this!

Please rewrite you equation with proper grouping symbols. For example, is the left hand side \(\displaystyle tan^2\theta-\dfrac{1}{tan^2\theta} or \dfrac{tan^2\theta-1}{tan^2\theta}\)? The same with the right hand side as well.

 

[stapel]

I'm having some problems calculating the below problem - they don't equal to each other!

Are you needing to "prove" that they're equal, so the instructions were "prove the identity"? Or are you needing to "calculate" a "solution" to the "equation", so the instructions were something like "solve on the indicated interval"? What have you tried? How far have you gotten? Where are you stuck?

Please be complete. Thank you!

 

[mmm4444bot]

Hello rain:

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