December 2018 1 20 Report
Czy poniższa zależność jest tożsamością trygonometryczną ?
a) sin \alpha sin \beta = \frac{1}{2} [ cos( \alpha - \beta ) - cos( \alpha + \beta )]
b) cos \alpha cos \beta = \frac{1}{2} [ cos( \alpha - \beta ) + cos( \alpha + \beta )]
c) sin \alpha cos \beta = \frac{1}{2} [ sin( \alpha - \beta ) + sin( \alpha + \beta )]
d) sin3 \alpha = -4 sin^{3}+ 3sin \alpha
e) cos3 \alpha = 4 cos^{3} \alpha -3cos \alpha
f) cos4 \alpha = 4 cos^{2} \alpha -3
More Questions From This User See All

Recommend Questions



Life Enjoy

" Life is not a problem to be solved but a reality to be experienced! "

Get in touch

Social

© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.