Table of Contents

## How do you multiply sinusoidal functions?

How to Multiply through a Trig Equation with Another Function

- Multiply each term by sin x. Why sin x?
- Subtract sin x from each side to set the equation equal to 0. 2sin2 x – sin x – 1 = 0.
- Factor the quadratic equation.
- Set each factor equal to 0.
- Solve for the values that satisfy the equations.

## Can you multiply two sine functions?

When you multiply two sine waves, you end up with the sum and difference frequencies. So if the input frequency is 600KHz and the local oscillator frequency is 1055kHz, you end up with 455kHz and 1655kHz. Your IF filter is tuned to 455kHz and so you reject the 1655kHz signal. (IF stands for Intermediate Frequency).

## What is sinusoidal function?

A sinusoidal function is one with a smooth, repetitive oscillation. “Sinusoidal” comes from “sine”, because the sine function is a smooth, repetitive oscillation. Examples of everyday things which can be represented by sinusoidal functions are a swinging pendulum, a bouncing spring, or a vibrating guitar string.

## How do you multiply trigonometry?

How to Multiply by a Conjugate to Find a Trigonometry Identity

- Multiply the numerator and denominator of the fraction on the left by the conjugate of the denominator.
- The two denominators multiplied together are the difference of two squares.

## What is a sinusoidal function of time?

The sine function has a period of 2π. That means the sin function completes one cycle when its entire argument goes from 0 to 2π. ω represents the frequency of a sine wave when we write it this way: sin(ωt). If ω=1 the sin completes one cycle in 2π seconds.

## What are the parts of a sinusoidal function?

Review the basic features of sinusoidal functions: midline, amplitude, and period.

## How is the period of a sinusoidal function calculated?

If you are instead given the equation, then the period is 2pi divided by the absolute value of the coefficient of x inside the sine or cosine function. This follows from the concept that increasing any angle by 2pi radians (a full revolution) has no effect on the angle’s sine and cosine.

## Which is an odd function in Sine and cosine?

A cofunction is a function in which f (A) = g (B) given that A and B are complementary angles. In the context of cosine and sine, Referencing the unit circle shown above, we can plug in values for cos (30°) and sin (60°) and see that: An odd function is a function in which -f (x)=f (-x).

## What are the properties of the sine function?

Below are a number of properties of the sine function that may be helpful to know when working with trigonometric functions. A cofunction is a function in which f (A) = g (B) given that A and B are complementary angles. In the context of cosine and sine,

## Which is the formula for sin and cosine?

ei = cos + isin Using equations 2 the real and imaginary parts of this formula are cos = 1 2 (ei + e i ) sin = 1 2i (ei e i ) (which, if you are familiar with hyperbolic functions, explains the name of the hyperbolic cosine and sine). In the next section we will see that this is a very useful identity (and those of