tan D = 7/4
sin D = 0.864
cos D = 0.494
Step-by-step explanation:
Tan ratio = opposite/adjacent
opposite = side opposite the angle D = 7
adjacent = base = 4
tan D = 7/4
sin ratio = opposite/hypotenuse
hypotenuse = 8.1
sin D= 7/8.1
sin D = 0.8642
To the nearest thousandth, sin D = 0.864
cosine ratio = adjacent/hypotenuse
cos D = 4/8.1
cos D = 0.4938
To the nearest thousandth, cos D = 0.494