6. Five mark exercise problems IX

From the given figure, prove that \(\theta + \phi = 90^{\circ}\). Also prove that there are two other right angled triangles. Find \(\sin \ \alpha\), \(\cos \ \beta\) and \(\tan \ \phi\).

 

 

Answer:

 

\(\sin \ \alpha =\) $\frac{i}{i}$

 

\(\cos \ \beta =\) $\frac{i}{i}$

 

\(\tan \ \phi =\) $\frac{i}{i}$