Math Problem Statement

A point P is on the terminal side of angle theta. Evaluate the six trigonometric functions for theta. Pleft parenthesis 6 comma negative 5 right parenthesis

Solution

Given that point P(6,5)P(6, -5) is on the terminal side of angle θ\theta, we can calculate the six trigonometric functions for θ\theta as follows:

Step 1: Find the radius rr.

The radius rr is the distance from the origin to the point P(x,y)P(x, y), and it is given by the formula: r=x2+y2r = \sqrt{x^2 + y^2} Substitute x=6x = 6 and y=5y = -5: r=62+(5)2=36+25=61r = \sqrt{6^2 + (-5)^2} = \sqrt{36 + 25} = \sqrt{61}

Step 2: Use the coordinates to find the trigonometric functions.

Now, we can calculate the six trigonometric functions based on the values of xx, yy, and rr.

  1. Sine: sin(θ)=yr=561\sin(\theta) = \frac{y}{r} = \frac{-5}{\sqrt{61}}
  2. Cosine: cos(θ)=xr=661\cos(\theta) = \frac{x}{r} = \frac{6}{\sqrt{61}}
  3. Tangent: tan(θ)=yx=56\tan(\theta) = \frac{y}{x} = \frac{-5}{6}
  4. Cosecant (the reciprocal of sine): csc(θ)=ry=615\csc(\theta) = \frac{r}{y} = \frac{\sqrt{61}}{-5}
  5. Secant (the reciprocal of cosine): sec(θ)=rx=616\sec(\theta) = \frac{r}{x} = \frac{\sqrt{61}}{6}
  6. Cotangent (the reciprocal of tangent): cot(θ)=xy=65\cot(\theta) = \frac{x}{y} = \frac{6}{-5}

Final Answers:

  • sin(θ)=561\sin(\theta) = \frac{-5}{\sqrt{61}}
  • cos(θ)=661\cos(\theta) = \frac{6}{\sqrt{61}}
  • tan(θ)=56\tan(\theta) = \frac{-5}{6}
  • csc(θ)=615\csc(\theta) = \frac{\sqrt{61}}{-5}
  • sec(θ)=616\sec(\theta) = \frac{\sqrt{61}}{6}
  • cot(θ)=65\cot(\theta) = \frac{6}{-5}

Would you like more detailed explanations of any of the steps, or do you have another question?


Additional Questions:

  1. How would the trigonometric functions change if the point was in a different quadrant?
  2. Can you verify the values of sin(θ)\sin(\theta) and cos(θ)\cos(\theta) using a calculator?
  3. How does the value of rr relate to the concept of the unit circle?
  4. What are the signs of the trigonometric functions in each quadrant?
  5. How do you convert between rectangular coordinates and polar coordinates?

Tip:

When solving trigonometric problems with points, always start by calculating the radius rr, as it’s fundamental for all the functions.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Coordinate Geometry
Pythagorean Theorem

Formulas

r = √(x² + y²)
sin(θ) = y/r
cos(θ) = x/r
tan(θ) = y/x
csc(θ) = r/y
sec(θ) = r/x
cot(θ) = x/y

Theorems

Pythagorean Theorem

Suitable Grade Level

Grades 9-12