# A new wave

Using the rectangular to polar conversion facility on your calculator express y(t)=4*sin(3*pi*t)-2*cos(3*pi*t) as a single cosine term.

Plot the graph of y(t) and check that the Frequency tab, displaying amplitude, phase, real and imaginary values, gives the expected result.

#amplitude #phase #realimaginary #trigonometricfunctions #frequencyanalysis #dsp #rectangulartopolar

plotXpose app is available on Google Play

Google Play and the Google Play logo are trademarks of Google LLC.

Versions will shortly be available for iOS and Windows.

Google Play and the Google Play logo are trademarks of Google LLC.

Versions will shortly be available for iOS and Windows.

plotXpose app is a companion to the book Mathematics for Electrical Engineering and Computing by Mary Attenborough, published by Newnes, 2003.