Mifcellanea Curio fa. 1 9 



b. -r\. . XV; • • *g" "^"2— R2-S2- 



do. We have fby DivifionJ this Series, 



RiS\)SR* 

 * .^3 V Sj + _S? + i£ &c SR2-S3 

 b 1 R2 1 R4 1 R6 R8 (XL ' V 



6 1. That isf putting R=i; +S5 ..l5 



S + S? + S' + S', 8rc. — *i , 



62. Which f multiplying % 



the refpeftive members by £3 s 



*s,;s,ss, is,; c s, &c.; be- H^ -g 



comes 



1 + \S< + + IS* + 8fc. +g 



Which is the Aggregate of Tangents to the 

 Arch, whofe right Sine is S. 



63. And this method may be a pattern for 

 the like procefs in other cafes of like nature. 



An 



