Section 64

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Unformatted text preview: Section 6.4 Sum and Difference Formulas Sum and Difference Formulas for Cosines, Sines, and Tangents cos(+)=cos()cos() sin()sin() cos()=cos()cos() + sin()sin() sin(+)=sin()cos() + cos()sin() sin()=sin()cos() cos()sin() tan(+)=tan()+tan()/[1 tan()tan()/] tan()=tan() tan()/[1+ tan()tan()/] Unfortunately you will need to know all of these Section 6.5 DoubleAngle and HalfAngle Formulas Double-Angle Formulas Using the sum formulas from the last section we can obtain the doubleangle formulas. sin(2) = 2sin()cos() cos(...
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