Answer: On the interval [25, 30] the function y = cos x is at it's minimum at x = 9pi or about 28.26.
The graph of y = cos x starts at 1 and moves in the shape of a wave from -1 to 1. It reaches it's first minimum value when x = pi. The period of the wave is 2 pi.
Therefore, it is at its lowest value at the following values, 1pi, 3pi, 5pi, 7pi, 9pi... The value in our given interval is 9pi.
With intersecting chord lengths multiplying the 2 given lengths of one chord needs to equal the multiplication of the 2 lengths of the 2nd chord
so on chord FH you have 3.5 and 4.8
multiply those: 3.5 x 4.8 = 16.8
so now chord GI needs to equal 16.8
to find Y divide 16.8 by 2.4
y = 16.8 / 2.4 = 7
y = 7
Step-by-step explanation:
it seems the answer is c. 3514 in3