Answer:
3/2
Step-by-step explanation:
sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

Use 
so

Answer: 83%
Explanation: idk how to explain but there ya go
Answer:
C and D
Step-by-step explanation:
just took the quiz
It would be C because if you take out the four, the coefficients are multiples of 4 so it simplifies down.
Answer:
Step-by-step explanation:
240/360 can be simplified to 2/3. r^2 can be substituted for 9, and 2/3*9 is 6.