Answer:
Approximately 86 cars
Step-by-step explanation:
$1,500/$17.50
= 86 cars approximately
Yes 3 times r is 3r and 3 times -6 is -18
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)
Make the mixed number to a whole fraction if you can or e.g. 2 3/3= 3 and add the whole number to the sum e.g. 3+4=7
