Which expression is equivalent to 4/9×7

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

1- identificar select the category that corresponds to each term. january 23 11: 59 pm unlimited attempts remaining grade settings 276-279 vocabulary list modelo fiesta quinceañera casada adolescencia viudo juventud navidad niñez vejez aniversario de bodas divorciado madurez cumpleaños soltera

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)