3) Complele el desarollo y delamina que \( x=6 \) \[ x \operatorname{Sen} 30^{\circ} \cdot \cos ^{2} 45^{\circ}=\frac{\operatorname{ctg}^{2} 30^{\circ} \cdot \sec 60^{\circ} \cdot \operatorname{tg} 45^{\circ}}{\sec ^{2} 45^{\circ} \operatorname{se} 60^{\circ}} \] \( \left.x\left(\frac{1}{2}\right) \cdot(1)\right)^{2}=3.2 \)

49. Hisoblang: \( 8 \cos \frac{\pi}{7} \cdot \cos \frac{4 \pi}{7} \cdot \cos \frac{5 \pi}{7} \) A) -1 B) 4 C) 1 D) 2

Law of Sines Score: \( 11 / 25 \quad \) Penalty: 1 off Question In \( \Delta \mathrm{TUV}, u=3.4 \) inches, \( m \angle \mathrm{U}=144^{\circ} \) and \( m \angle \mathrm{~V}=35^{\circ} \). Find the length of \( v \), to the nearest 10 oth of an inch Answer Attempt 1 out of 2

Solve, triangle \( A B C \) in which \( a=72.5, \angle B=60^{\circ}, \angle C=83^{\circ} \)

22. Find the exact value of \( \sin (A+B) \), given \( \sin A=-\frac{4}{5}, A \) is in Quadrant \( I I I, \tan B=\frac{15}{17} \) and \( B \) is in Quadrant \( I \).

\( \sin ^ { 2 } ( \alpha + \beta ) - \sin ^ { 2 } \alpha - \sin ^ { 2 } \beta \)