Angle a is an acute angle in a right triangle

given that sin a= 7/25 what is the ratio for cos a

Sin=opositeside/hyptonuse
cos=adjacentside/hyptoonse
try and draw a diagram
pretend we gots
acute angle is on left side
right angle is below obtuse angle

so sinA=7/25=left side/hypotonuse
so we need to find other side
pythagorean theorme

a²+b²=c²
7²+b²=25²
49+b²=625
b²=576
b=24

so

sinA=o/h
cosA=a/h

7=o
25=h
24=a

cosA=24/25

How many people are we starting with? i will answer it's just i need to divide 8 by the total amount of people to get how many tables