\( \cos 2 x - \sin x \leq 0 \)

6) \( \frac{1-\cos 2 \alpha}{\sin 2 \alpha} \)

A 20-foot ladder is set up against a building so that the ladder makes an angle of 73° with the ground. The height, h, is the vertical distance from the top of the ladder to the base of the building. The base, b, is the horizontal distance from the bottom of the ladder to the base of the building. What is the approximate height-to-base ratio? \(sin73° \approx 0.9563\)\(cos73° \approx 0.2924\)\(tan73° \approx 3.2703\)3.27:1 0.31:1 3.42:1 0.96:1 

\( \cos ( \alpha - \beta ) = \cos ( \alpha ) - \cos ( \beta ) ( \pi ) \)

Find the quotient. Leave the result in trigonometric form. (Le \[ \frac{\cos (\pi)+i \sin (\pi)}{\cos (2 \pi / 3)+i \sin (2 \pi / 3)} \]

Find the product. Leave the result in trigonometric form. (Enter your an \[ \left[\frac{1}{3}\left(\cos \left(140^{\circ}\right)+i \sin \left(140^{\circ}\right)\right)\right]\left[\frac{4}{5}\left(\cos \left(240^{\circ}\right)+i \sin \left(240^{\circ}\right)\right)\right] \]