In a right triangle, which pair of angles are $\mathrm{linear}\mathrm{pairs}$?

In a right triangle, one of the acute angles measures $80°$. What is the measure of the other acute angle?

If one angle of a right triangle is $\theta$ such that $\theta =61.8°$, what is the measure of the other non-right angle in degrees?

Given that $\cos b$ = $\sin a$ and $ma=32°$ in a right triangle, what is the value of $mb$?

Given a right triangle where the side adjacent to angle $\theta$ is $4$ units and the hypotenuse is $5$ units, what is the value of $\sec \theta$?

Which of the following statements is true about the tangent function $\tan$ in a right triangle?

In a right triangle, if angle 1 is a right angle so $m\angle 1=90°$, what is the measure of angle 2 if the third angle is $45°$?

In a right triangle, which of the following ratios represents the cosine of angle $\theta$?

Triangle $ABC$ is a right triangle with angles $A$, $B$, and $C$. If angle $C$ is the right angle, which statement is true about the measures of angles $A$ and $B$?