Trig Functions Lesson

Six Trig Functions

Learn about labeling the sides of a right triangle and setting up trig ratios.

Summary

• SOH: stands for  $\sin\theta=\frac{opp}{hyp}$  

• CAH: stands for  $\cos\theta=\frac{adj}{hyp}$  

• TOA: stands for  $\tan\theta=\frac{opp}{adj}$  

• csc is the flip of sin:  $\csc\theta=\frac{hyp}{opp}$  

• sec is the flip of cos:  $\sec\theta=\frac{hyp}{adj}$  

• cot is the flip of tan:  $\cot\theta=\frac{adj}{opp}$  

Multiple Choice

Which side is adjacent to angle x?

• 1
• 2
• 3

Multiple Choice

If you are given the opposite side and hypotenuse, which trig function should you use?

• sine
• cosine
• tangent
• cotangent

Multiple Choice

Which function is the reciprocal function of the cosine?

• sine
• cosecant
• secant
• tangent

Multiple Choice

What is  $$\cos A$$  ?

• $$\frac{29}{20}$$  

• $$\frac{21}{29}$$  

• $$\frac{20}{29}$$  

• $$\frac{21}{20}$$  

Multiple Choice

Select the correct ratio for SinA

• 37/35

• 12/35

• 35/37

• 12/37

Multiple Choice

what is sec(θ)

• 12 / 13

• 5 / 15

• 15/ 5

• 13 / 12