If the cosine function is stretched by a factor of 10 , what will the resulting function \( f(x) \) be? (1 point) \( f(x)=\cos (10 x) \) \( f(x)=\cos (20 x) \) \( f(x)=\cos \left(\frac{x}{10}\right) \) \( f(x)=\cos \left(\frac{x}{20}\right) \)

\( 1 - \tan ^ { 2 } x \geq 0 \)

As part of her assignment, Devi has to use her clinometer to measure the height of an office tower \( T A \). From a point \( B \), she observes that angle \( T B A=34^{\circ} \). She then walks 25 m away from the office tower to a point \( C \) and observes that angle \( T C A=26^{\circ} \). Find the height of the sfice tover.

Дан треугольник \( A B C \), в котором \( \angle A+\angle B=90^{\circ} \), а \( \sin B=\frac{2 \sqrt{5}}{10 \sqrt{10}} \) Найди \( \cos ^{2} B \).

\( \tan \theta=-\frac{3}{4} \), given that \( \theta \) is in quadrant IV

\( \theta=\frac{2 \pi}{7} \) radians, \( \omega=\frac{2 \pi}{3} \) radian per minute Use formula \( \omega=\frac{\theta}{t} \) to find the value of the missing variable.