Question

Using trig ratios to find the missing side or angle of a right triangle

Answer 1

$\\ \sf\longmapsto cos31=\dfrac{12}{x}$

$\\ \sf\longmapsto 0.85=\dfrac{12}{x}$

$\\ \sf\longmapsto x=\dfrac{12}{0.85}$

$\\ \sf\longmapsto x=14.11$

Answer 2

>> Answer

________

$\:$

cos (31°) = 12/x

0.85 = 12/x

x = 12/0.85

x ≈ 14.1