For the given triangle, the cosine of angle A equals 
.
Step-by-step explanation:
Step 1; In the given triangle, the opposite side has a length of 9 units, the adjacent side has a length of 3√3 units while the hypotenuse of the triangle measures 6√3 units. To calculate the cosine of angle A we divide the adjacent side by the hypotenuse side.
cos A = 
.
Step 2; Length of the adjacent side = 3√3 units.
Length of the hypotenuse side = 6√3 units.
cos A = 3√3 / 6√3
cos A = .
To check we also have A = 60° and cos 60° = .
This equation has only one solution
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P.S. Hello from Russia
Answer: The sum of the measures of the interior angles of a decagon (10 sided polygon) is 1,440. We found this by using the formula (n-2)(180). Thus, to find the measure of each interior angle we simply divide the sum by the number of total sides in the polygon. 1,440/10 = 144.
Step-by-step explanation: Hopefully this helps!
Answer:
7
Step-by-step explanation:
We have the expression 3n - 5, which we know the value of n is 4. We are asked to solve.
Since we know that n = 4, we can substitute 4 with n in the expression :
3(4) - 5
12 - 5
7
Answer:
B: -13*
C: -2*
D: 8*
E: -11*
Step-by-step explanation:
math
