Prove using identities \( \frac{\sin 2 x}{1-\cos 2 x}=2 \csc 2 x-\operatorname{tin} x \)

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

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

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

A plane takes off at an angle of \( 11^{\circ} \) to the horizontal. If the plane maintains a speed of \( 270 \mathrm{~km} / \mathrm{h} \), what horizontal distance has it travelled after flying for 2 minutes?

35. Diketahui segitiga ABC siku-siku di \( \mathrm{B}, \mathrm{a}=8 \mathrm{~cm} \) dan \( \mathrm{c}=6 \mathrm{~cm} \), maka nilai \( \cos A=\cdots \) a. \( \frac{4}{3} \) b. \( \frac{4}{5} \) c. \( \frac{5}{3} \) d. \( \frac{3}{5} \) e. \( \frac{3}{4} \)