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Trigonometric Function Grapher

Interactive trigonometric function grapher for visualizing sine, cosine, tangent, cotangent, secant, and cosecant. Customize amplitude, frequency, phase shift, and vertical shift (y = A·f(B(x-C)) + D) with real-time parameter adjustment. Perfect for students, teachers, and engineers.

Trigonometric Function Grapher
Quick Examples
Standard Sine Standard Cosine A=2, D=1 Double Freq Phase π/2 Tangent Secant Cosecant
A
Amplitude
Vertical stretch factor
B
Frequency
Horizontal compression
C
Phase Shift
Horizontal translation
D
Vertical Shift
Vertical translation
to

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About Trigonometric Function Grapher

Welcome to the Trigonometric Function Grapher, a powerful interactive visualization tool for exploring sine, cosine, tangent, and other trigonometric functions. Whether you're a student learning about function transformations, a teacher creating educational materials, or an engineer analyzing periodic phenomena, this tool provides intuitive real-time graphing with comprehensive mathematical explanations.

What Are Trigonometric Functions?

Trigonometric functions are fundamental mathematical functions that relate angles to ratios of sides in right triangles. They form the foundation of wave analysis, signal processing, physics, and engineering. The six primary trigonometric functions are:

FunctionDefinitionPeriodRange
sin(x)Opposite / Hypotenuse2π[-1, 1]
cos(x)Adjacent / Hypotenuse2π[-1, 1]
tan(x)sin(x) / cos(x)π(-∞, ∞)
cot(x)cos(x) / sin(x)π(-∞, ∞)
sec(x)1 / cos(x)2π(-∞, -1] ∪ [1, ∞)
csc(x)1 / sin(x)2π(-∞, -1] ∪ [1, ∞)

The General Form: y = A·f(B(x - C)) + D

All trigonometric functions can be transformed using four key parameters that control their shape and position:

General Transformation Form
$$y = A \cdot f(B(x - C)) + D$$

Understanding Each Parameter

How to Use This Grapher

  1. Select your function type: Choose from sine, cosine, tangent, cotangent, secant, or cosecant using the visual selector.
  2. Set transformation parameters: Enter values for Amplitude (A), Frequency (B), Phase Shift (C), and Vertical Shift (D).
  3. Adjust the viewing window: Set X-axis minimum and maximum values. Common choices include -2π to 2π or 0 to 4π.
  4. Click "Graph Function": Generate the interactive visualization.
  5. Explore with sliders: Use the real-time interactive controls to modify parameters and watch the graph update instantly.

Key Formulas

Period Formulas

Period of Sine and Cosine
$$T = \frac{2\pi}{|B|}$$
Period of Tangent and Cotangent
$$T = \frac{\pi}{|B|}$$

Key Points for Standard Functions

For y = sin(x), key points in one period [0, 2π]:

Frequently Asked Questions

What is the general form of a trigonometric function?

The general form is y = A·f(B(x - C)) + D, where A is amplitude (vertical stretch), B affects the period (Period = 2π/|B| for sine/cosine), C is the phase shift (horizontal translation), and D is the vertical shift. This form allows you to describe any transformation of the basic trigonometric functions.

How do I find the period of a trigonometric function?

For sine and cosine functions, the period is 2π/|B| where B is the frequency coefficient. For tangent and cotangent, the period is π/|B|. For example, y = sin(2x) has period π because 2π/2 = π, meaning it completes one full cycle in π units instead of 2π.

What is the difference between amplitude and vertical shift?

Amplitude (A) determines how far the function stretches vertically from its midline - it controls the height of peaks and depth of troughs. Vertical shift (D) moves the entire function up or down without changing its shape. For y = 2sin(x) + 3, amplitude is 2 (oscillates 2 units above and below midline) and vertical shift is 3 (midline is at y=3).

Why does tangent have vertical asymptotes?

Tangent is defined as sin(x)/cos(x). When cos(x) = 0 (at x = π/2 + nπ for any integer n), division by zero creates vertical asymptotes where the function approaches positive or negative infinity. This is why tangent graphs have repeating vertical asymptotes and the function is undefined at those points.

How does phase shift affect a trigonometric graph?

Phase shift (C) moves the graph horizontally. A positive C shifts the graph to the right, while negative C shifts it left. For y = sin(x - π/2), the graph shifts right by π/2 units, making sin(x - π/2) = -cos(x). Phase shift is crucial in physics for describing waves that start at different points in their cycle.

Applications of Trigonometric Functions

Additional Resources

Reference this content, page, or tool as:

"Trigonometric Function Grapher" at https://MiniWebtool.com/trigonometric-function-grapher/ from MiniWebtool, https://MiniWebtool.com/

by miniwebtool team. Updated: Jan 23, 2026

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