Npgm

This page lists questions and answers that were posted by visitors named Npgm.

Questions

The following questions were asked by visitors named Npgm.

Answers

The following answers were posted by visitors named Npgm.

sin2x / 1 - cos2x = cotx 2sinxcosx / 1 - (1-2sin^2x) 2sinxcosx / 2sin^2x cosx/sinx = cotx

2sin(x+y)sin(x-y) = cos2y - cos2x lhs 2(sinx cosy + cosx siny) (sin x cos y – cosx siny) 2( sin^2xcos^2y – sinxcosycosxsiny + sinxcosycosxsiny – cos^2xsin^2y) 2(sin^2xcos^2y – cos^2xsin^2y) 2[(1-cos^2x)cos^2y – (1-cos^2y)cos^2x] 2[cos^2y-cos^2xcos^2y – co...