Difference between revisions of "Specimen Cyprus Seniors Provincial/2nd grade/Problem 2"
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== Problem == | == Problem == | ||
| − | If <math>\alpha=sinx_{1}</math>, <math>\beta=cosx_{1}sinx_{2}</math>, <math>\ | + | If <math>\alpha=sinx_{1}</math>, <math>\beta=cosx_{1} sinx_{2}</math>, <math>\gamma=cosx_{1}cosx_{2} sinx_{3}</math> and <math>\delta=cosx_{1}cosx_{2}cosx_{3}</math> prove that <math>\alpha^2+\beta^2+\gamma^2+\delta^2=1</math> |
== Solution == | == Solution == | ||
Revision as of 06:17, 12 November 2006
Problem
If 
, 
, 
and 
prove that 
