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Solve the trigonometric equation:
Make a substitution:
and the equation becomes
Rewrite conveniently
– t as
+ t – 2t, and then factor the left-hand side by grouping:
Factor out
2t + 1:
Substitute back for
t = cos x:
Therefore,
where
k is an integer.
Solution set:
I hope this helps. =)
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Twelve people join hands for a circle dance.In how many ways can they do this? Suppose six of these people are men, and the other six are women. In how many ways can they join hands for a circle dance, assuming they alternate in gender around the circle
Answer:
86400 ways
Step-by-step explanation:
Since the circle can be rotated, the number of ways to arrange a distinct number of n objects in a circle will be (n−1)!.
Now, if we rotate the circle with the six women, we will see that there are 5! ways with which they can be placed in the circle.
After picking the places for the women, we will now fill each gap between two women with a man.
We have 6 men. Thus, number of ways to arrange the men is 6!
Thus,number of ways they can join hands for a circle dance, assuming they alternate in gender around the circle = 5! × 6! = 86400 ways
Answer:
32x
Step-by-step explanation:
Answer:
50
Step-by-step explanation:
