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An equation is formed of two equal expressions. The given equation is not true.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The complete question is: Check whether the given equation is true or not?cos2pi/7+cos4pi/7+cos8pi/7=1/8.
To know if the given equation,
is true or not, both the sides of the equation are needed to be solved separately.
The value of
when simplified is equal to -0.5, or the value can be written as -(1/2).
Since the right side of the equation is equal to -1/2, while the right side of the equation is 1/8. Thus, the given equation is not true.
Hence, the given equation is not true.
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Answer:
We conclude that the area of the right triangle is:

Hence, option A is correct.
Step-by-step explanation:
From the given right-angled triangle,
Using the formula to determine the area of the right-angled triangle
Area of the right triangle A = 1/2 × Base × Perpendicular

Factor 2p-6: 2(p-3)
Divide the number: 2/2 = 1





Therefore, we conclude that the area of the right triangle is:

Hence, option A is correct.
Answer:
an 12-1.5n
Step-by-step explanation: