Step-by-step explanation:
The formula for calculating a circle's circumference is πd, where π is an irrational number (3.14....) and d is the diameter of the circle.
In the circle with diameter 19.5cm, the circumference is around 3.14 * 19.5cm = 61.23cm. (A)
Answer: it’s A..
Step-by-step explanation:
No, because it fails the vertical line test.
Answer:
tana + tanb
Step-by-step explanation:
Using the trigonometric identities
• sin(a + b) = sinacosb + cosasinb
• tanx =
, then

= 
=
+ 
=
+ 
= tana + tanb
Answer:
46-3i
Step-by-step explanation:
Answer:
+5x+9
Step-by-step explanation: