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7.3 Addition & Subtraction Formulas. 1. Special Angles, Co-functions & Quadrants. 2. Addition & Subtraction Formulas. 3. Practice Problems. Special Angles. Special Angles (Cont.). Cofunctions. Signs of Trigonometric Functions. Addition & Subtraction Formulas. - PowerPoint PPT Presentation
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7.3 Addition & Subtraction Formulas
3
2
1Special Angles, Co-functions & Quadrants
Addition & Subtraction Formulas
Practice Problems
2
Special AnglesDegrees
Radians
SIN COS TAN COT SEC CSC
0˚ 0 0 1 0 U 1 U
30˚ 245˚ 1 160˚ 290˚ 1 0 U 0 U 1
22
22
21
6
2
4
3
23
21
23
33
3
3
33
332
2 2
332
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Special Angles (Cont.)Degrees Radians SIN COS
135˚180˚ 0 -1225˚270˚ -1 0315˚
43
45
23
47
22
22
22
22
22
22
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Cofunctions
cossin cofunction sincos cofunction
cscsec cofunction seccsc cofunction
cottan cofunction tancot cofunction
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Signs of Trigonometric Functions
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Addition & Subtraction Formulas
vuvuvu sinsincoscos)cos(
vuvuvu sinsincoscos)cos(
vuvuvu sincoscossin)sin(
vuvuvu sincoscossin)sin(
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Addition & Subtraction Formulas
vuvuvu
tantan1tantan)tan(
vuvuvu
tantan1tantan)tan(
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Examples
9
More Examples
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Practice Problems Page 531
Problems 1-22
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Practice Problems Page 531
Problems 23-44
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