Question

Please make sure it is correct it is important

Answer 1

Answer:

Pi = 3.14  we can call p

Qu 1) p = 1.57 = 1/2 pi = coordinates (1.57 , -3) = x = 1.57 y = -3

Qu 2) p = 7.85 = 1/2 pi x 5 = coordinates ( 7.85 . -3) = x = 7.85 y= -3

Step-by-step explanation:

Qu. 1) p = 3.14/2 = 1.57

Qu 2) p = 1.57 +3.14 +3.14 = 7.85

=1.57 x 5 = 7.85

Answer 2

Answer:

Step-by-step explanation:

$y=2cos(x+\frac{\pi }{2} )+(-1)\\x=0,y=2 cos \frac{\pi }{2}+( -1)=-1\\x=-\frac{\pi }{2} ,y=2 cos (0)-1=2-1=1\\x=\frac{\pi}{2} ,y=2cos (\frac{\pi }{2} +\frac{\pi}{2} )+(-1)=2cos (\pi )-1=-2-1=-3$