Exercise2Verifythat1.2cos(x+y)cos(xy)=cos(2x)+cos(2y);2.2sin(x+y)sin( - PDF document

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Uploaded On 2015-11-19

Exercise2Verifythat1.2cos(x+y)cos(xy)=cos(2x)+cos(2y);2.2sin(x+y)sin( - PPT Presentation

ABa ccosAAC ABb candsinBAC ABb ccosBBC ABa cApplyingtheseformulaetotherightangledtriangleABCwherea1bp 3c2weinferthatAhas30degreesor6radiansBhas60degreesor3radiansandChas90degr ID: 199163

AB=a c;cosA=AC AB=b c;andsinB=AC AB=b c;cosB=BC AB=a c:Applyingtheseformulaetotheright-angledtriangleABC wherea=1;b=p 3;c=2 weinferthatAhas30degreesor=6radians Bhas60degreesor=3radians andChas90degr

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