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visits member for 1 year, 9 months
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10h
comment How is the sin function being rewritten?
@recursiverecursion interesting, what textbook is this from if you dont mind me asking?
10h
comment How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?
Neat application, thanks!
11h
comment How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?
Thanks for that!
11h
comment How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?
Could you show how you would solve for $a$ and $b$ please?
11h
comment How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?
Sorry, made the appropriate edits
11h
asked How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?
11h
comment Help needed verifying a trigonometric identity
How did the numerator go from $\tan(x+h)-\tan (x)$ to $\sin (x+h-x) $?
14h
accepted Help needed verifying a trigonometric identity
14h
comment Help needed verifying a trigonometric identity
Is it not possible to use the right hand side?
14h
comment Help needed verifying a trigonometric identity
If you can clean it up please do so, due to all the fractions the text had become quite small so I was worried no one would be able to read it.
14h
asked Help needed verifying a trigonometric identity
Jul
20
comment Deriving the sum-to-product identities
Thank you for your answer!
Jul
20
accepted Deriving the sum-to-product identities
Jul
20
comment Deriving the sum-to-product identities
Thank you, that was a very concise and clear explanation
Jul
20
comment Deriving the sum-to-product identities
@heropup, thanks, i see what you mean now..
Jul
20
comment Deriving the sum-to-product identities
@AndréNicolas, Why is it that I need to use different letters?
Jul
20
asked Deriving the sum-to-product identities
Jul
20
comment Soviet Russian Mathematical Books
Just to add to this, a publisher going by the name of MIR seems to have been a big player in publishing texts by prominent Soviet mathematicians, however it is very difficult to get hold of those books today, some of them can be found on the site mirtitles.org
Jul
14
revised A few questions regarding the cosine difference identity
added 65 characters in body
Jul
14
accepted Applying the cosine even identity to the cosine difference identity