# Maths trig

posted by .

Use compound angle formulae to express Second harmonic i2= sin2t and the the third harmonic i3=sin3t in terms of the first harmonic sint

• Maths trig -

sin2t = 2 sint cost

sin3t = sint cos2t + cost sin2t
(cos2t = 1 - 2sin^2 t)

• Maths trig -

Thanks :)

• Maths trig -

Whats the workings out to get to these answers ? Jw ta

## Similar Questions

1. ### Harmonic Oscillation

The velocity of a certain simple harmonic oscillator is given by: v=-(12m/s)sin [(6.0rad/s)t]. What is the amplitudeof the simple harmonic oscillator. Please show your work.
2. ### science

A stretched string has a third harmonic frequency of 600 Hz. What is the frequency of the second harmonic?
3. ### science

A stretched string has a third harmonic frequency of 600 Hz. What is the frequency of the second harmonic?
4. ### physics

How does a wavelength of the fourth harmonic on a rope with both ends fixed compare with that of the second harmonic?
5. ### math

pls. explain how to get this: A number x is the harmonic mean of two numbers a and b if 1/x is the mean of 1/a and 1/b. a) Write an equation to represent the harmonic mean of a and b. b) Determine the harmonic mean of 12 and 15. c) …
6. ### physics

Which one of the following statements about standing waves on a string is FALSE?
7. ### physics

Which one of these statements regarding standing waves on a string is FALSE Select one: a. The frequency of the first harmonic depends on the tension in the string b. The frequency of the first harmonic depends on the speed of the …
8. ### Physics

Organ pipe A, with both ends open, has a fundamental frequency of 225 Hz. The third harmonic of organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are
9. ### physics

A tube that is open on both ends is 4 meters long. Assuming that the speed of sound is 340m/s, find the following: a) What is the wavelength of the fundamental standing wave (the first harmonic) b) What is the frequency of the fundamental …
10. ### physics

A tube that is open on both ends is 4 meters long. Assuming that the speed of sound is 340m/s, find the following: a) What is the wavelength of the fundamental standing wave (the first harmonic) b) What is the frequency of the fundamental …

More Similar Questions