$2\:cos^2x\:-\:2\:sin^2\:x\:=\:0$
$4\left(2-7\right)$
$x^4+x^3-8x^2-4x=0$
$-3^2-3$
$4x+12\left(x-3\right)=28$
$2x+7\geq3x-4$
$\frac{1}{1-\cos^2x}=1+\cot^2x$
Get a preview of step-by-step solutions.
Earn solution credits, which you can redeem for complete step-by-step solutions.
Save your favorite problems.
Become premium to access unlimited solutions, download solutions, discounts and more!