# Trigonometry

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### #1 Khoxy

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Posted 09 May 2019 - 08:12 AM

QUESTION.
Suppose that A is a second quadrant angle with sin A = 1/4. Determine the exact value of sin (A/4).

I'm clueless. May someone help please!

### #2 Flummoxed

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Posted 09 May 2019 - 08:33 AM

0.063

### #3 OceanBreeze

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Posted 09 May 2019 - 08:55 AM

Do you understand why that answer is correct? If you don't, ask!

People here are desperate to talk to anyone who isn't claiming relativity is wrong and Einstein was a nut case.

Edited by OceanBreeze, 09 May 2019 - 08:56 AM.

### #4 Khoxy

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Posted 09 May 2019 - 09:01 AM

I need a clue that has led to an answer so that I can finalise it by my self

### #5 OceanBreeze

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Posted 09 May 2019 - 09:04 AM

If Sin A = X

How do you find A?

### #6 Flummoxed

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Posted 09 May 2019 - 09:05 AM

This is about as close to a clue as it gets without punching the numbers for you.

Do you have a sin-1 key on your calculator. Try keying in 0.25 and hitting it, then divide this number by 4 and hitting the sin key. hey presto you have done some basic, very basic maths.

### #7 OceanBreeze

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Posted 09 May 2019 - 09:09 AM

Carry on, Flummoxed. I think I need to go for a drink.

### #8 Khoxy

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Posted 09 May 2019 - 09:17 AM

I got you Flummoxed. I have proven the calculation. Thanks OceanBreeze for the hint

### #9 Flummoxed

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Posted 09 May 2019 - 09:18 AM

Carry on, Flummoxed. I think I need to go for a drink.

That's always a good option. Do you have a bar onboard your ship, within easy walking distance. I am guessing there might be a some waves of a sinusoidal nature, If you are in an ocean with just a breeze. Equator or Polar

### #10 OceanBreeze

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Posted 09 May 2019 - 11:05 AM

Not a drop allowed  aboard ship. We are presently in port though.

### #11 ralfcis

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Posted 09 May 2019 - 11:36 AM

So far I'm still waiting to talk to someone who can support Einstein and refute his theory wasn't fraud. I don't go so far as to say the experimental results supporting the facts of relativity were also fudged as some here people do.