Trigonometric Ratios

Identify side AB, with respect to the marked angle.

• opposite

• hypotenuse

• linear pair

• adjacent

Identify side PQ, with respect to the marked angle.

• isosceles

• hypotenuse

• opposite

• adjacent

Identify side XZ, with respect to the marked angle.

• isosceles

• hypotenuse

• opposite

• adjacent

Identify side LN, with respect to the marked angle.

• isosceles

• hypotenuse

• opposite

• adjacent

Identify the mnemonic used with Trig Ratios.

• SAH COA TOH

• SOA CAH TOA

• SHO CAH THA

• SOH CAH TOA

 Identify the trig ratio that may be used to find the marked unknown side.

•  $Sin\ 38\degree\ =\ \frac{h}{15}$  

•  $Sin\ 38\degree\ =\ \frac{15}{h}$  

•  $Cos\ 38\degree\ =\ \frac{15}{h}$  

•  $Tan\ 38\degree=\ \frac{h}{15}$  

Identify the trig ratio that may be used to find the marked unknown side.

•  $Sin\ 29\degree=\frac{x}{91}$  

•  $Tan\ 29\degree\ =\ \frac{91}{x}$ 

•  $Cos\ 29\degree\ =\ \frac{x}{91}$ 

•  $Tan\ 29\degree=\ \frac{x}{91}$ 

Identify the trig ratio that may be used to find the marked unknown angle.

•  $Sin\ y\degree=\frac{12}{18}$  

•  $Cos\ y\degree\ =\ \frac{18}{12}$ 

•  $Cos\ y\degree\ =\ \frac{12}{18}$ 

•  $Tan\ y\degree=\ \frac{12}{18}$ 

Identify the trig ratio that may be used to find the marked unknown side.

• $Sin\ 38\degree=\frac{w}{15}$

• $Cos\ 38\degree\ =\ \frac{15}{w}$

• $Tan\ 38\degree\ =\ \frac{w}{15}$

• $Sin\ 38\degree=\ \frac{15}{w}$

The reciprocal of the sine is the ...

• Secant

• Cosecant

• Cotangent

• SinLog