Trigonometry Examples

$a^{2} + 4 {(a)}^{2} = 7^{2}$

Step 1

Add $a^{2}$ and $4 a^{2}$ .

$5 a^{2} = 7^{2}$

Step 2

Raise $7$ to the power of $2$ .

$5 a^{2} = 49$

Step 3

Graph each side of the equation. The solution is the x-value of the point of intersection.

$a \approx - 3.13049516, 3.13049516$

Step 4