# Problem with Vibration and Waves AP French?

• Karim Habashy
In summary, the conversation is discussing the value of COB, which is determined to be 90-δ based on the given information about the angles. One person initially thought it was not 90-δ, but later realizes their mistake. The conversation ends with a note of thanks.
Karim Habashy
Hi All,

Kindly see the attached Pictures.

I think COB is not 90 - δ/2
But
COB is 90-δ

Can someone confirm.

Thanks.

No. It is over 2.
Why do you think is not so?

∠'CBO' = 90 and ∠'OCB' = δ
∴ from the Δ 'OCB' we find that :
∠'COB' = 180-90-δ = 90-δ

Why do you think CBO is 90? These triangles seem to be isosceles and not right-angle. Aren't these triangles all equal?
Otherwise how do you know that the angle at OCB is delta?

Ya, you r right, i got it -_- .
My mind played tricks on me, i had the wrong mental image of an inscribed polygon in a circle, haven't done geometry in sometime.

Thanks

## 1. What is the difference between vibrations and waves?

Vibrations refer to the back-and-forth motion of an object, while waves are the transfer of energy through a medium. Essentially, vibrations are the cause of waves.

## 2. How do vibrations and waves affect our daily lives?

Vibrations and waves are all around us and play a crucial role in our daily lives. Vibrations can be seen in everyday objects such as musical instruments, while waves are responsible for important phenomena like sound, light, and radio transmission.

## 3. What causes problems with vibrations and waves in AP French?

Problems with vibrations and waves in AP French often arise when students struggle to understand the complex concepts and equations involved in the subject. It can also be challenging to apply these concepts to real-life situations.

## 4. How can I improve my understanding of vibrations and waves in AP French?

To improve your understanding of vibrations and waves in AP French, it is important to actively engage with the material and practice solving problems. It can also be helpful to seek out additional resources, such as textbooks or online tutorials, for extra practice and clarification.

## 5. Are there any real-life applications of vibrations and waves in AP French?

Yes, there are many real-life applications of vibrations and waves in AP French. For example, understanding the principles of sound waves is crucial in fields such as acoustics and sound engineering, while knowledge of electromagnetic waves is essential in modern technology like cell phones and Wi-Fi.

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