HOW WOULD I WRITE THIS IN C++ CODE SO THAT IT GIVES ME THE CORRECT VALUE OF H?

H=cos1[(R1/2G1/2B)/R2+G2+B2RGRBGB]H=360cos1[(R1/2G1/2B)/R2+G2+B2RGRBGB]ifGB,orifB>G

H H cos-l[ (R - 1/2G - 1/2B)/VR2 + G2 + - RG- RB - GB ] if G B, or 360 - cos-l[ (R - 1/2G - 1/2B)/VR2 + G2 + - RG- RB - GB ] if B > G.