1. Find the value of \( \tan \left(\sin ^{-1} \frac{1}{2}+\cos ^{-1} \frac{4}{5}\right. \)

What is the definition of the tangent function in relation to a right triangle?

11. if \( \cos \theta=\frac{3}{3}, \theta \in Q_{1} \) then \( \cot \theta+\operatorname{cosec} \theta= \) \( \begin{array}{llll}\text { a) } 1 & \text { b) } 25 & \text { c) } 3 & \text { d) } 4\end{array} \)

Define the secant function in terms of a right triangle.

22.2. а) \( \cos 15^{\circ}+\cos 45^{\circ} \) б) \( \cos 46^{\circ}-\cos 74^{\circ} \)

б) \( \frac{\sin 130^{\circ}+\sin 110^{\circ}}{\cos 130^{\circ}+\cos 110^{\circ}} \)