Friday

February 27, 2015

February 27, 2015

Posted by **Anonymous** on Tuesday, May 4, 2010 at 9:04pm.

- trig -
**Reiny**, Tuesday, May 4, 2010 at 9:50pm4cos^2x-3=0

cos^2 x = 3/4

cos x = ± √3/2

If by primary solutions you mean 0≤ x ≤ 360

then x = 30°, 150°, 210°, 330°

in radians: π/6, 5π/6, 7π/6,11π/6

the second one:

tanx(1-tanx) = 0

tanx = 0, or tanx = 1

let me know what you got for x

**Answer this Question**

**Related Questions**

Trigonometry - Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b...

Trigo - Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b in ...

trigonometry (please double check this) - Solve the following trig equations. ...

trig - Find the smallest positive value of x(in degree) for which tan(x+100°)=...

Math - How do I solve this? tan^2x= 2tanxsinx My work so far: tan^2x - 2tanxsinx...

Pre-Cal - Perform the addition or subtraction. tanx - sec^2x/tanx tan^2(x)/tan(x...

Trig - Verify that each of the following is an identity. tan^2x-sin^2x=tan^2xsin...

Trig check my work please? - tan(X+30)tan(30-x)=2cos2x-1 / (2cos2x+1) i just did...

trig - We are doing trig identities in school. I need help with these five: 1.1+...

Trig. - sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times...