Sin and COS wave form's both are the same!

when I load the my code it doesn’t mater which waveform I chose, I still
get a sin wave on the scope.
I send two signals from the two TX basic board’s, one is Sin and the
other is COS. when I still get two SIN signals!! only the when I connect
the two out singles from one TX board to the scope I get sin and cos,
but these are the I and Q singles.

did any one tried to doe this, and have it actually working?
please help thanks.

Anmar