#1

I don't remember ever being taught trig at high school (UK) so i'm trying to teach myself now. Really it's part of a larger scheme to get into physics (I'm a history major at school, but want more science skills) but i need to brush up on my algebra and trig skills first.

I'm watching the below video (at the bottom), and i'm trying to work out the last

Could someone talk me through how to work this out?

So far i've got

tan (.36) = 3/A

=

A tan (.36) = 3

or

For this equation the answer is 8 if i have followed the video correctly, but i don't know how to get from that equation in bold to the answer 8.

Thanks

https://www.youtube.com/watch?v=RoXmKYjpLGk

I'm watching the below video (at the bottom), and i'm trying to work out the last

*tan*equation (tan .36 = 3/A) as he leaves it unexplained after going through the*cos*equation. I can't do it. I can't work out what the tan .36 is using an online scientific calculator.Could someone talk me through how to work this out?

So far i've got

tan (.36) = 3/A

=

A tan (.36) = 3

or

**A = 3/tan (.36)**For this equation the answer is 8 if i have followed the video correctly, but i don't know how to get from that equation in bold to the answer 8.

Thanks

https://www.youtube.com/watch?v=RoXmKYjpLGk

*Last edited by USCENDONE BENE at Aug 12, 2013,*

#2

The answer is 7.

#3

?

http://www.wolframalpha.com/input/?i=3%2F%28tan%28.36%29%29

using a calculator, press the tan button and then press .36

might vary depending on model, but that's an issue with your calculator more than anything else

http://www.wolframalpha.com/input/?i=3%2F%28tan%28.36%29%29

using a calculator, press the tan button and then press .36

might vary depending on model, but that's an issue with your calculator more than anything else

#4

?

http://www.wolframalpha.com/input/?i=3%2F%28tan%28.36%29%29

using a calculator, press the tan button and then press .36

might vary depending on model, but that's an issue with your calculator more than anything else

Yah, my biggest problem is that i don't own a scientific calculator and rely on online ones which give me varying answers.

Like for instance in that video he gives cos .36 as

__8√73/73__rather than as a decimal

*Last edited by USCENDONE BENE at Aug 12, 2013,*

#5

tan .36 = 3/A

Multiply by A to give Atan0.36=3

Divide by tan0.36

A=3/tan0.36

Multiply by A to give Atan0.36=3

Divide by tan0.36

A=3/tan0.36

#6

All I remember about trigonometry is the mnemonic "All Slappers Take Cash"

#7

All I remember about trigonometry is the mnemonic "All Slappers Take Cash"

Never calling it the CAST diagram again

#8

Never calling it the CAST diagram again

+1

#9

If you need a scientific calculator, you can use the one on Windows.

Just enter calculator, click view, and then scientific, for those useful functions. I would suggest getting a reasonable priced one and learning to use it though, they can last through degrees unless you need a graphing calculator.

As for the question itself, others have already solved it. One last bit of advice, you may not ever learn about the difference between degrees and radians, but make sure you know which one you are working with at the time. I didn't watch the video, but that question seems like it's in radians to me, so working in degrees would give an incorrect answer, you'd need to convert or work through it.

Just enter calculator, click view, and then scientific, for those useful functions. I would suggest getting a reasonable priced one and learning to use it though, they can last through degrees unless you need a graphing calculator.

As for the question itself, others have already solved it. One last bit of advice, you may not ever learn about the difference between degrees and radians, but make sure you know which one you are working with at the time. I didn't watch the video, but that question seems like it's in radians to me, so working in degrees would give an incorrect answer, you'd need to convert or work through it.

#10

life without math is beatiful

#11

life without math is beatiful

-1

The beauty of Mathematics has become...almost religious for me.

#12

its B. Always pick B.

#13

Ya you usually just put that into a calculator

#14

life without math is beatiful

Based on this statement and your spelling, I'm just gonna assume you're not very smart. No need to validate this assumption; I know I'm right.

#15

life without math is beatiful

Only if you view it as work.

Maths can be shockingly beautiful.

#16

If you were educated in the UK then you were definitely taught it because it's on the curriculum.

#17

If you were educated in the UK then you were definitely taught it because it's on the curriculum.

I was in a lower set for maths. Pythagorean theorem is as much as i can remember doing

#18

^It's not standardized? yikes

#19

I was in a lower set for maths. Pythagorean theorem is as much as i can remember doing

So was I and I did it.

#20

life without math is beatiful

life without spelling is amzing

#21

So was I and I did it.

In which case i only have myself to blame for finding this hard as I obviously wasn't paying much attention. I genuinely don't remember any of this

#22

TS, you should just take a precalc class and it will solve all your problems