Thursday

March 26, 2015

March 26, 2015

Posted by **Sandy** on Wednesday, March 10, 2010 at 5:05pm.

- trig -
**FredR**, Wednesday, March 10, 2010 at 6:14pm9cos^2(t)+3cos(t)=0

subtract 3cos(t) from both sides

9cos^2(t)=-3cos(t)

divide both sides by 3cos(t)

3cos(t)=-1

cos(t)=-1/3

t=arccos(-1/3)

**Answer this Question**

**Related Questions**

Trig - Given 2secant^2 (theta) + 1 = 5 secant (theta), solve for (theta), to the...

Trig(continued) - 2)Find the solution of sin2 theta = cos theta if 0 -< theta...

Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...

trig 30 - If cos^2 theta -6 sin 2 theta =0, one value of theta is a)0 degrees b...

trig - If sin theta is equal to 5/13 and theta is an angle in quadrant II find ...

Trigonometry - I don't understand how I'm supposed set the problem up or what ...

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

Mathematics - 1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 ...

math - theta is an angle in standard position with a domain of 0 degrees < ...

Math 30 Trig - What is the value of theta if 9 cos^2 theta + 3 cos theta = 0 ...