Answer:
How many subsets and proper subsets does a set have? If a set has “n” elements, then the number of subset of the given set is 2n and the number of proper subsets of the given subset is given by 2n-1. ... We know that the formula to calculate the number of proper subsets is 2n – 1.
Answer:
27.7 units
Step-by-step explanation:
The distance between points and can be calculated using formula
Find the lengths of the sides of DEF using previous formula:
Hence, the perimeter is
Hello,
I have search in my memory : (not sure)
But we can make easier (see picture)
Answer: Believe you can and you're halfway there
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I don’t have the answer but I’m just spreading positivity.
We will use double angle identities:
cos (5x ) = sin (10x )
cos (5x ) = 2 cos (5x ) sin ( 5x )
cos ( 5 x) - 2 cos ( 5 x ) sin ( 5x ) = 0
cos ( 5 x ) · [ 1 - 2 sin (5 x) ] = 0
cos ( 5 x ) = 0 or : 1 - 2 sin (5 x) = 0
5 x = π/2 +kπ, k∈Z sin (5 x) = 1/2
x1 = π/10 + kπ/5 5 x = π/6+2kπ , k∈ Z
5 x = 5π/6 +2kπ , k∈ Z
x 2 = π/30 +2kπ/5
x 3 = π/9 + 2kπ/5