Thursday

September 18, 2014

September 18, 2014

Posted by **help!** on Saturday, September 19, 2009 at 2:21am.

- Trigo! -
**MathMate**, Saturday, September 19, 2009 at 7:23amYou have done the right step, check your answers after you have squared each side of an equation.

Take a simple case of

x=-4

square both sides,

x²=(-4)²=16

x=√16=±4

check:

x=-4 OK

x=+4 not a solution.

In your case, the solution of 73.126° is correct. The other one is false.

**Answer this Question**

**Related Questions**

Trig....... - I need to prove that the following is true. Thanks (2tanx /1-tan^x...

maths - trigonometry - I've asked about this same question before, and someone ...

maths trigo - prove that sin(n+1)A-sin(n-1)A/cos(n+1)A+2cos(nA)+cos(n-1)A=tanA/2

Trig--check answer - Solve the equation of the interval (0, 2pi) cosx=sinx I ...

calc - Where do I start to prove this identity: sinx/cosx= 1-cos2x/sin2x please ...

Trig Help - Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx...

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

Pre-calc - prove the identity: (cosx)(tanx + sinx cotx)=sinx+cos(squared)x i ...

Trigo help! - Ok, i've tried this question, and it brings me to no answers. ...

check math - Here are my answers. Can you check if I got the right answers? ...