A. Using the trigonometry ratio of the angle BAC. Find the length of BN

8. En la expresión \( \frac{\operatorname{sen} 1125^{\circ}-\cos 2940^{\circ}+\tan 1830^{\circ}}{\operatorname{sen} 1410^{\circ}} \) se pide a) Escribir cada función trigonométrica en función del ángulo de referencia b) Calcular su valor rea.

В треугольнике \( A B C \) угол \( C \) равен \( 90^{\circ}, \operatorname{tg} A=\frac{33}{4 \sqrt{33}}, A C=4 \). Найдите 1B.

Given that \( \theta \) is an obtuse angle and \( \operatorname{cosec} \theta=k \), express, in terms of \( k \) (a) \( \cot \theta \)

0) Find the exact value of \( \tan \left(22.5^{\circ}\right) \).

(11) Find the exact value of \( \sin (2 x), \cos (2 x) \) and \( \tan (2 x) \) given the inforn tjon below. \( 81-4=77 \) \( \sin (x)=\frac{2}{9}, \frac{\pi}{2}<x<\pi \)