Question 163
In a right-angled triangle, we define the cosine of its acute angles $\alpha$ by: $\cos \alpha=\frac{\text{adjacent leg}}{\text{hypotenuse}}=\frac{c}{a}$.
The right triangle in the figure has side $OA=1$. Write in ascending order the cosines of the angles of $25^{\circ}, 41^{\circ}$ and $58^{\circ}$
The right triangle in the figure has side $OA=1$. Write in ascending order the cosines of the angles of $25^{\circ}, 41^{\circ}$ and $58^{\circ}$