" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
ctgα=2
tgα = sinα/cosα
czyli 2sinα=cosα
sin²α+cos²α=1
sin²α+ (2sinα)²=1
5sin²α=1
sinα= 1/√5
cosα= 2/√5