I need help with Trigonometry

Question

anonymous · Answer

I need it explained step by step

akashdeepdeb · Answer

Ask Away!, :D

anonymous · Answer

$$\tan 4 \theta + \tan 2 \theta/ 1-\tan 4\theta \tan 2 \theta$$

akashdeepdeb · Answer

There is this identity that states this...

tan(A+B) = (tanA + tanB)/(1-tanA.tanB)

Can you get your answer from the identity above?? :D

anonymous · Answer

I have to Rewrite the expression as a trigonometric function of a single angle measure.

akashdeepdeb · Answer

Exactly! Do it like identity tells you. :D

anonymous · Answer

what do you do just add them together?

anonymous · Answer

Im new to this trig stuff...book doesnt help much at all

akashdeepdeb · Answer

Yes.
Your answer equals tan(4 theta + 2 thta) = tan(6 theta)
We don't JUST add them up.
We follow the identities. LEARN THE TRIGONOMETRIC IDENTITIES!! :D
Understood this?
Check out some Internet links.

akashdeepdeb · Answer

You just have to learn these identities and apply them in your calcs.. http://www.sosmath.com/trig/Trig5/trig5/trig5.html Check out some Utube/KhanAcademy vids. :)

anonymous · Answer

thanks

akashdeepdeb · Answer

:)