Answer: (2α) = cos²(α) - sin²(α)
Step-by-step explanation:
The expression for cosine of the sum of two angles is:
cos (α + β) = cos(α)*cos(β) - sin(α)*sin(β)
in case α = β
cos ( α + α ) = cos (2α) = cos(α)*cos(α) - sin(α)*cos(α)
Hence cos (2α) = cos²(α) - sin²(α)
1 litre is left. 1.2 litres = 1200 ml so 1200-200=1000, or 1l
If the ratio is 5/8, or 8/5
Tobias picked five daisies and eight roses.
For every eight shots, Micah made five baskets.
If the ratio is 5/13, or 13/5
Sally found five green fruit loops in her cereal bowl, out of every thirteen pieces.
If the ratio is 8/3, or 3/8
Aly painted eight trees for every three birds.
435.
Add em all up and you’ll get 435.
Answer:c
Step-by-step explanation:
