SOLUTION: The height h, of a dock above sea level is given by h=6+4cos(15p), 0<p<6. Find:
a) the value of h when p=4
b) thw value of p when h=9
THANK YOU
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Question 1020016: The height h, of a dock above sea level is given by h=6+4cos(15p), 0
a) the value of h when p=4
b) thw value of p when h=9
THANK YOU
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
h = 6 + 4cos(15p)
The value of when p = 4
h = 6 + 4cos(15 x 4)
h = 6 + 4cos(60)
Cos60 = 0.5
h = 6 + 4 x 0.5
h = 8 units
The value of p when h = 9
6 + 4cos(15p) = 9
4cos(15p) = 9/6
cos(15p) = 9/(6 x 4)
cos(15p) = 9/24
cos(15p) = 0.375
(Using cos^-1 = 0.375)
15p = 67.98
p = 67.98/15
p = 4.53 (2 decimal places)
Hope this helps :-)
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