PJHS Right Triangle Trigonometry- Day 2

PJHS Right Triangle Trigonometry- Day 2

Homework

Homework from TEXT: Page 516- #14-18 

Step#1:  Find the missing side using Pythagorean Theorem 

Step #2:  Find Soh, Cah, Toa (see problems from class for format)

Six Trig Functions

SOH     CAH   TOA 
CHO     SHA   CoTAO 

SINE               COSINE       TANGENT
COSECANT    SECANT       COTANGENT

EXAMPLE #1- Find all Six Trig Functions

• SIN = O/H             CSC = H/O

• COS = A/H            SEC = O/H

• TAN = O/A           COT = A/O

EXAMPLE #2- Find all Six Trig Functions

SIN = O/H             CSC = H/O

COS = A/H            SEC = O/H

TAN = O/A           COT = A/O

Practice Set

Using the TI-84 to Find Angle Measures

• Find angle A if sin A = 4/5.

• *** be sure you are in degree mode

• 2nd, sin, 4/5
  
  

• Solution to Two Decimal Places Please

• 53.13

Fill in the Blanks

What is the angle in degrees when:

cos A = 3/5?

Multiple Choice

What is the measure of Angle $\theta$  ?  $Tan\ \Theta\ =\ \frac{12}{13}$  

• 0.016

• 42.71