MHB Deriving expressions using double angle formula?

kjeanch
Messages
2
Reaction score
0
How do I use the double angle identity in order to derive this expression: cos6(u)?
 
Mathematics news on Phys.org
I am assuming you mean:

$$\cos^6(u)$$

However, I'm not sure what you mean by deriving it. Can you post the question in its entirety?
 

Thread 'Non-orthogonal bases'

Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Similar threads

MHB Use double or half angle formulas
Replies
1
Views
1K
B Compound Angle Formula: Solving Double Angle Equations
Replies
5
Views
1K
I Formula For Calculating Field Angle (Beam Angle) of Light?
Replies
2
Views
2K
I Dimension of an Angle: Clarifying the SI Standard
Replies
1
Views
2K
A Margules' Power Series Formula: Deriving Coefficients
Replies
1
Views
1K
Preservation of the angle between two vectors
Replies
9
Views
2K
MHB Cos Trig Identity: Deriving Formula for Circuits Analysis
Replies
1
Views
2K
I Euclid's Formula as a test for sufficiency
Replies
6
Views
2K
I Why is it important to convert angle units when using trigonometric functions?
Replies
8
Views
2K
MHB How to Derive Answers Using N Formula
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top