Sin 7A - sin A / (sin 8A + sin 2A)

sin 7A/ sin 2A di ako sure na Tama yan sorry pero yan Ang sagot ko

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right