Section 7.2 Addition and Subtraction Formulas Objectives: To understand how to apply the addition and subtraction formulas.

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Presentation transcript:

Section 7.2 Addition and Subtraction Formulas Objectives: To understand how to apply the addition and subtraction formulas.

Ex 1. Find the exact value of the trigonometric function. a)sin 150  b)cos 135  c)cos (-60  ) d)csc 225 

Class Work 1. tan 300  2. cot 210  3. sin 540  4. sec 630 

Formulas for Sine

Ex 2. Use an addition or subtraction formula to find the exact value of the expression a)sin 75  b)sin 15 

Class Work Use an addition or subtraction formula to find an exact value for the expression. 5.sin 105  6.

Formulas for Cosine

Ex 3. Use an addition or subtraction formula to find the exact value of the expression a)cos 75  b)

Class Work Use an addition or subtraction formula to find an exact value for the expression cos 15 

Formulas for Tangent

Ex 4. Use an addition or subtraction formula to find an exact value for the expression. a)tan 165  b)

Class Work tan 15 

HW#1 Worksheet 7.2