Algebra Examples

$r = 10 \cos (x)$

Step 1

Multiply both sides by $r$ .

Tap for more steps...

Step 1.1

Multiply both sides by $r$ .

$r \cdot r = r (10 \cos (x))$

Step 1.2

Simplify the left side.

Tap for more steps...

Step 1.2.1

Multiply $r$ by $r$ .

$r^{2} = r (10 \cos (x))$

Step 1.3

Simplify the right side.

Tap for more steps...

Step 1.3.1

Rewrite using the commutative property of multiplication.

$r^{2} = 10 r \cos (x)$

Step 2

Since $r^{2} = x^{2} + y^{2}$ , replace $r^{2}$ with $x^{2} + y^{2}$ and $r$ with $\sqrt{x^{2} + y^{2}}$ .

$x^{2} + y^{2} = 10 \sqrt{x^{2} + y^{2}} \cos (x)$