The value of the expression sec (-π) is equal to -1 if the given expression is undefined.
As given in the question,
Given expression: sec (-π)
Standard position of unit circle: -π is representing semicircle with terminal point on negative x-axis with coordinates (-1, 0)
Hypotenuse = √ (-1)² + 0²
= 1
Value of the expression is given by
sec α = Hypotenuse / Base (x-coordinate)
⇒sec(-π) = 1 / -1
⇒sec(-π) = -1
Therefore, the value of the expression sec (-π) is equal to -1.
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Answer:
the number of faces of a cube
Step-by-step explanation:
For an edge length of s, the area of one face of a cube is s^2. The area of all six faces of the cube, the total surface area, is 6s^2. The number 6 represents the number of congruent faces of a cube.
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6.4 micrograms were administered to the patient.
The general form of this equation would be:
, where A is the total amount left, p is the initial amount, r is the rate of decay, and t is the number of time periods.
For our question, A =0.1 since that is the amount left; p is unknown; r is -0.5, since it loses half of its mass; and t will be 6. 2 hours = 120 minutes/20 minutes = 6 20-minute increments:
Divide both sides by 0.5^6: