The answer of this equation is 8cm I did the math
Answer:

Step-by-step explanation:
Given: sin x + cos x
To change the given trigonometry expression in term of sine only.
Trigonometry identity:-
Expression: 
We get rid of cos x from expression and write as sine form.
Expression:

Hence, The final expression is only sine function.
Answer:
B
Step-by-step explanation:
If you do 640/75 that equals 8.5333 etc. That is between 8 and 9!
Hope that helps!
Answer: The radius of circle is 19.1 meters.
Explanation:
Since we have given that
Circumference of a circle = 120 meters
As we know the formula for "Circumference of circle" i.e.

Hence, the radius of circle is 19.1 meters.