Wednesday

August 20, 2014

August 20, 2014

Posted by **John** on Tuesday, November 6, 2012 at 2:04pm.

- Pre Calc -
**Steve**, Tuesday, November 6, 2012 at 2:35pmI don't think you really meant

tan(4x) = 1 - sin^2(cos^2(x)), so do you mean

tan 4x = 1 - 8 sin^2 x cos^2 x?

Let's see.

8sin^2 x cos^2 x = 2*sin^2(2x))

tan(4x) =? 1 - 2sin^2(2x)

Naah. Check your problem again.

However, cos(4x) = 1 - 2sin^2(2x))

**Related Questions**

Precalculus with Trigonometry - Prove or disprove the following Identities: cos...

calculus - prove cos squared B- sin squared B= 2cos squared B -1

math - prove the identity : cos^4 theta- sin ^4 thetaover sin squared theta cos ...

Precalculus - Prove or disprove cos(x+y)cos(x-y)=cos squared (x) - Sin squared (...

calc - Where do I start to prove this identity: sinx/cosx= 1-cos2x/sin2x please ...

math - i am having a minor difficulty i've been stuck for over an hour and don't...

algebra 2 multiple choice HELP - find f(a), if f(t) = 2t2(squared)-t-2 A. 2(a+t)...

math - How do i find the area of a triangle? For example: A squared + b squared...

Mathematics - I have to show that for any (pi)A, Sin(A)squared + Cos(A)squared...

pre-calc - Hey, I was wondering how do you factor (a^2-x^2)? (a squared minus x ...