Wednesday

April 1, 2015

April 1, 2015

Posted by **Jerry** on Tuesday, November 13, 2012 at 9:46am.

sin^4theta - cos^4theta = sin^2theta-cose^2theta

- Trig Identity -
**Reiny**, Tuesday, November 13, 2012 at 10:10amLS = sin^4 Ø - cos^4 Ø

= (sin^2 Ø + cos^2 Ø)(sin^2 Ø - cos^2 Ø)

= (1)(sin^2 Ø - cos^2 Ø)

= RS

**Answer this Question**

**Related Questions**

math - how do you get sin(4theta)/1+cos(4theta) to equal tan(2theta)

Math - sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),...

Prove or Disprove - Cos(X+y)cos(x-y)= cos^2theta - sin^2theta I foiled the left ...

math - There are no typos and no work b/c I don't know how to do them. Thanks. 1...

Math - 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees...

Precalc+trig - Solve tan(40/90) for the double angle cos(2theta). I know I use ...

trig - find the single term of cos^2 4theta - sin^2 4theta

Math - There are no typos and no work b/c I don't know how to do them. Thanks. 1...

Math - sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),...

Math - Find one solution for each equation. 1. cos 4theta = sin theta 2. tan ...