Answer:
Step 1:
✔ Cofunction identity
Step 5:
✔ Sine difference identity
Step 6:
✔ Cofunction Identity
Step 7:
✔ Cosine function is even, sine function is odd.
Step-by-step explanation:
Im pretty sure its 37 because
8.5 x 2 = 17 10 x 2 = 20
then add
17 + 20 = 37 :)) hope this helps
(you multiply by 2 because on a sheet a paper there 4 sides on the paper and two for each number)
37 is your awnser :))
A rectangle has two pairs of congruent sides, but not 4 congruent sides.
