#### simonbramble

##### Active Member

I appreciate that (sine squared + cos squared = 1). However, what about just (sine + cos)?

I think the result is another sinewave of a higher amplitude, of the same frequency, but with a phase shift, but I cannot work out what trigonometric identities to use to prove this mathematically.

Please can someone with more mathematical skills than me let me know the answer, together with some sort of mathematical proof (or explanation as to how to work out the answer)!

Thanks

Simon