" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
cos²x+2sinxcosx+sin²x-2sinxcosx=2sinx
wiemy, że sin²x+cos²x=1, więc
1=2sinx
sinx=½
x=30⁰
x=π/6