17. The obtuse angle \( B \) is such that \( \tan B=-\frac{5}{12} \) Find the values of: (a) \( \sin B \) (b) \( \cos B \) (c) \( \sin 2 B \) (d) \( \cos 2 B \)

\( g ( x ) = \cos ( x ) - \sin ( x ) = 0 \)

41. Аз нуктаи А дар зери кунчи \( 60^{\circ} \) ба хамвори моил гуза- ронита шудааст Дарозии моилро ёбед, агар проексияи он ба хамвори 8 cm бошад.

\( \left. \begin{array} { l } { g ( x ) = \sin x + \cos x - 1 } \\ { g ( x ) = \cos ( x ) - \sin ( x ) = 0 } \end{array} \right. \)

\( A B C \) is a triangle. \( A C K K \nabla .9 \mathrm{~cm} \) Angle \( B=90^{\circ} \) Angle \( C=38^{\circ} \) Calculate the length of \( B C \). Give your answer correct to 3 significant figures

1. COMPRENDE. Representa en un plano cartesiano dos ángu los que sean coterminales al ángulo dado en cada punto. a. \( -\frac{\pi}{4} \) b. \( \frac{3 \pi}{2} \)