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Let’s check out your problem:

What is the value of 
tan(225^(@))?
Choose 1 answer:
(A) -1
(B) 
-(sqrt2)/(2)
(C) 
(sqrt2)/(2)
(D) 1

What is the value of tan(225)? \tan \left(225^{\circ}\right) ? \newlineChoose 11 answer:\newline(A) 1-1\newline(B) 22 -\frac{\sqrt{2}}{2} \newline(C) 22 \frac{\sqrt{2}}{2} \newline(D) 11

Full solution

Q. What is the value of tan(225)? \tan \left(225^{\circ}\right) ? \newlineChoose 11 answer:\newline(A) 1-1\newline(B) 22 -\frac{\sqrt{2}}{2} \newline(C) 22 \frac{\sqrt{2}}{2} \newline(D) 11
  1. Understanding the tangent function: Understand the trigonometric function of tangent.\newlineThe tangent of an angle in a right triangle is the ratio of the length of the opposite side to the length of the adjacent side, i.e., tan(θ)=oppositeadjacent \tan(\theta) = \frac{\text{opposite}}{\text{adjacent}} .
  2. Recognizing the angle in the third quadrant: Recognize the angle 225225^\circ is in the third quadrant.\newlineAngles between 180180^\circ and 270270^\circ lie in the third quadrant, where both sine and cosine are negative, and therefore tangent (which is sine divided by cosine) is positive.
  3. Finding the reference angle: Find the reference angle for 225225^\circ.\newlineThe reference angle is the acute angle that the terminal side of the given angle makes with the x-axis. For 225225^\circ, the reference angle is 225180=45225^\circ - 180^\circ = 45^\circ.
  4. Using the reference angle to find the tangent: Use the reference angle to find the value of tangent.\newlineThe tangent of any angle is equal to the tangent of its reference angle, but with the sign that corresponds to the quadrant the original angle is in. Since 225225^\circ is in the third quadrant where tangent is positive, and the tangent of 4545^\circ is 11, the tangent of 225225^\circ is also 11, but with a negative sign due to the third quadrant's properties.
  5. Choosing the correct answer: Choose the correct answer.\newlineThe value of tan(225)\tan(225^\circ) is 1-1, which corresponds to answer choice (A) 1-1.