Answer:
1: C
2: a is true
b is false
c is true
d is true
i dont 3 sorry
Step-by-step explanation:
Solution :
We have been given a parametric curve :
x = sin t , y = cos t , 0 < t < π
In order to determine concavity of the given parametric curve, we need to evaluate its second derivative first.
Therefore,
Taking double derivatives of the above equation:
For the concave up, we have
∴
For the concave down, we have
Answer:
X2
Step-by-step explanation:
The answer is 90 :D if you get a chance make this the brainliest answer, thanks!