\( \frac { \operatorname { Csc } ^ { 4 } \theta - 1 } { \operatorname { Cot } ^ { 2 } \theta } = 2 + \operatorname { Cot } ^ { 2 } \theta \)

11. If \( \cos \theta=\frac{3}{5}, \theta \in Q \), then \( \cos \theta+\operatorname{cosec} \theta= \) \( \begin{array}{lll}\text { a) } 1 & \text { b) } 25 & \text { o) } 3\end{array} \quad \) d) 4

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

find the fundamental periodicity of the following fonction \( y=-5 \sin \left(\frac{1}{4}(3-x)\right)+1 \)

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

a) \( \sin \frac{\pi}{5}-\sin \frac{\pi}{10} \) б) \( \sin \frac{\pi}{3}+\sin \frac{\pi}{4} \)