Bentuk lain dari: 3 Sin² A - 2 Cos² A adalah... Pake cara yaa, makasih

[tex]3 {sin}^{2} ( \alpha ) - 2 {cos}^{2} ( \alpha ) \\ = 3 {sin}^{2} ( \alpha ) - 2(1 - {sin}^{2} ( \alpha )) \\ = 4 {sin}^{2} ( \alpha ) - 2 \\ atau \\ 4(1 - {cos}^{2} ( \alpha )) - 2 \\ = 2 - 4 {cos}^{2} ( \alpha )[/tex]