sleeveless... i can move way easier. but some competitions regulate that you wear one with sleeves so...
Use the difference formulas tan(alpha - beta) = sin(alpha - beta)/cos(alpha - beta) = [sin(alpha)cos(beta) - + sin(alpha)sin(beta)] = [(2sqrt(5)/5)(3/5) - + (2sqrt(5)/5)(-4/5)] = [ 6sqrt(5)/25 + - 8sqrt(5)/25] = = -2
Its doesnt really matter but most gymnastics leotards go to the neck so that when we move around it doesnt slip down. It will probably be fine because she wont be learning hard skills in the beginning. Most gymnastics leotards cost 32 dollars or so. ...