All Questions
4
questions
2
votes
2
answers
84
views
Is it possible to find angles and length of woods?
With respect to the picture below, is it possible to find the angles and the length of the wooden bars, if we have no further information? Any hint or clue would be appreciated.
- 25.2k
2
votes
0
answers
111
views
Application of integrating $\cos^4 x$?
A student asked a colleague the other day for a practical application that involved needing to integrate the fourth power of cosine, but no one here could think of one off-hand other than some volume ...
- 21
1
vote
1
answer
2k
views
Calculus - Trig Maximum Value Problem
When the rules of hockey were developed, Canada did not use the metric system. Thus, the distance between the goal posts was designated to be six feet. If Sidney Crosby is on the goal line, three feet ...
- 61
6
votes
5
answers
5k
views
How can I express the sum of $\sin a+\sin2a+\sin3a+\cdots+\sin(n-1)a$?
I want to sum up the partials of a harmonic series, how do I do it?
If I was using the 'Lagrange trigonometric identity to solve this problem', how would I plot it on Wolfram mathematica (using which ...
- 61