proof left as an exercise

06072022, 06:17 PM
Post: #5




RE: proof left as an exercise
Topdown proof (equivalent to previous post)
2*cos(30°) / (1+4*sin(70°)) = cos(30°) / (sin(30°) + 2*cos(20°)) = sin(20°)*cos(30°) / (sin(20°)*sin(30°) + sin(40°)) = sin(20°)*cos(30°) / (sin(20°)*sin(30°) + cos(50°)) = sin(20°)*cos(30°) / (cos(20°)*cos(30°)) = tan(20°) 

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Messages In This Thread 
proof left as an exercise  Thomas Klemm  06062022, 11:41 PM
RE: proof left as an exercise  Ángel Martin  06072022, 05:05 AM
RE: proof left as an exercise  Thomas Klemm  06072022, 05:32 AM
RE: proof left as an exercise  Albert Chan  06072022, 05:36 PM
RE: proof left as an exercise  Albert Chan  06072022 06:17 PM
RE: proof left as an exercise  Albert Chan  06082022, 01:50 AM
RE: proof left as an exercise  Albert Chan  06082022, 11:12 AM
RE: proof left as an exercise  Thomas Klemm  06082022, 11:18 PM
RE: proof left as an exercise  Albert Chan  06092022, 12:35 AM
RE: proof left as an exercise  Albert Chan  07012022, 07:51 PM
RE: proof left as an exercise  Albert Chan  07022022, 11:44 PM

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