SOLUTION: If the minimum value of the function y=cos theta +d is -5, the value of d is A)-5 B)-4 C)-6 D)-3

Algebra ->  Trigonometry-basics -> SOLUTION: If the minimum value of the function y=cos theta +d is -5, the value of d is A)-5 B)-4 C)-6 D)-3      Log On


   

Question 1091111: If the minimum value of the function y=cos theta +d is -5, the value of d is
A)-5
B)-4
C)-6
D)-3
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The minimum value of any cosine function is +-1+, so
+y%5Bmin%5D+=+-1+%2B+d+
+y%5Bmin%5D+=+-5+
+-5+=+-1+%2B+d+
+d+=+-4+
The answer is B)