7.3 addition & subtraction formulas
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7.3 Addition & Subtraction Formulas
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1Special Angles, Co-functions & Quadrants
Addition & Subtraction Formulas
Practice Problems
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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
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22
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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˚
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23
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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
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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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