Posted by **Colt** on Thursday, October 4, 2012 at 2:34am.

tan^2theta+6=sec^2theta+5

- trig -
**Reiny**, Thursday, October 4, 2012 at 8:36am
Are we solving for Ø ?

tan^2 Ø +6 = sec^2 Ø + 5

sin^2 Ø/cos^2 Ø + 6 = 1/cos^2 Ø + 5

times cos^2 Ø

sin^2 Ø + 6cos^2 Ø = 1 + 5 cos^2 Ø

sin^2 Ø + cos^2 Ø = 1

1 = 1

ahh, it was an identity, thus true for all values of Ø, except Ø = 90° , 270° , 450° ..... or 90° + 180k , where k is an integer.

## Answer This Question

## Related Questions

- Math - sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),...
- Calculus - What is the integral of 1-tan^2theta from 0 to pi/3? Using the ...
- Precalc+trig - Solve tan(40/90) for the double angle cos(2theta). I know I use ...
- Math - Prove: [(tan^2theta+1)(cos^2theta-1)]=1-sec^2theta
- Math - 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees...
- Further mathemactics - Demostrate the validity of tan^2theta-sin^2theta=sin^...
- math - There are no typos and no work b/c I don't know how to do them. Thanks. 1...
- 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),...
- trig - establish identity 5csc^2theta-3cot^2theta=2csc^2theta+3

More Related Questions