SLO 3.1 - Finding Trig Ratios/Reference Angles from Trig Ratios

If the tangent ratio of reference angle C is $$\frac{4}{3}$$   or $$\frac{40}{30}$$   equivalently, what is the closest the tangent ratio in decimal number format (to 4 decimal places)?

Which entry in either of the two tangent columns is CLOSEST to 1.3333?

(a)  

If the nearest tangent ratio of reference angle C is 1.3270 what is its angle measurement to the nearest degree?

(a)  

If reference angle A has a cosine ratio of $$\frac{3}{5}$$  or equivalently $$\frac{18}{30}$$  , it can be expressed in decimal format as .6000 (divide 3 by 5 or 18 by 30). What is the nearest cosine ratio to .6000 ?

Since the nearest cosine ratio to $$\frac{3}{5}=0.6000$$  is .6018, what is the measurement of reference angle A (to the nearest degree)?

(a)  

The decimal equivalent (to 4 decimal places) to the cosine of $$\frac{40}{41}=.9756\ \$$  , what is the angle measurement of the reference angle A to the nearest degree?

If the sine of a reference angle is .4540, what is the angle measure to the nearest degree

(a)