1 107 



APPENDIX A 



TABLE OF NATURAL SINES 



Hote. The sine of any given angle is the length of the perpendicular opposite the given angle in a 

 right-angled triangle which contains the given angle divided by the length of the hypotenuse. The 

 above table is constructed on the principle that the hypotenuse is always equal to "unity, by which 

 means the fraction is got rid of, as the denominator may be left out. Thus, 



Sin 3n- Perpendicular j 

 hypotenuse 1 



4n2 



