Geometry
# Trigonometric Functions

If $\displaystyle \tan A=\frac{3}{4},$ what is the value of $7\cos A ?$

$\angle ACB = 90^\circ,$ $AC=50,$ and $BC= 50\sqrt{3},$ what is $\angle BAC ?$

IfIf $\displaystyle \tan A=\frac{9}{40},$ what is the value of $7\cos A ?$