Posted by **Tri** on Thursday, June 21, 2007 at 11:10pm.

what is your answer for 8sin^2theta + sintheta -1 ?

and how would you do it ? thanks

You have not written an equation. There is nothing to "solve". Did you leave out an " = 0 " ?

Yeah sorry

Yeah sorry

Let x = sin theta

8x^2 +x -1 = 0

x = [-1 +/- sqrt(33)]/16

= 0.296535 or -0.421535

theta = 17.250 degrees or -24.931 degrees

pork?

## Answer This Question

## Related Questions

- Pre-Calculus - Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta sec^2theta ...
- Science - Given seccant of thata = 3, use trigonometric identities to find the ...
- Precalc please - Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta
- Trig - Solve each equation for exact solutions over the interval [0,360)where ...
- Math - sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),...
- Precalc+trig - Solve tan(40/90) for the double angle cos(2theta). I know I use ...
- maths - I'm reviewing for my exams, and I was sure that I was comfortable with ...
- trig - solve the equation of the domain 0¡Ü¦È¡Ü2¦Ð 3cos^2theta - 5costheta -1 = ...
- Calculus - 2sin(2theta) + sqrt(3) = 0 interval (0,2pi) How do I solve this? I ...
- maths - if cot theta =7/8 , evaluate (1+sin^2theta)(1-sin^2theta)/(1+cost^2theta...

More Related Questions