GBeau
Reputation
367
Top tag
Next privilege 500 Rep.
Access review queues
 Nov9 revised Matrix algebra involving exponents just adjusted matrix typography Nov5 revised Matrix algebra involving exponents made example 3x3 Nov5 answered Matrix algebra involving exponents Nov4 revised How to solve large modulus manually? fix closing of notation Nov4 suggested approved edit on How to solve large modulus manually? Nov4 awarded Commentator Nov4 comment What are the applications of Euler's formula? A derivation of n-angle (double, triple, ...) identities is a nice quick result $(\cos x + i\sin x)^n=\cos (nx) + i\sin (nx)$; expand the left. Nov3 comment projectile motion (with height) complicated @carry I can tell you the correct answer matches to the velocity of the 7.35m fall to at least 6 digits. (12.0025...) Nov3 comment projectile motion (with height) complicated You can solve it with Lagrangian multipliers and minimization. If $\theta$ is the angle above the horizontal, you're minimizing $v=\frac{10.5}{t\cos (\theta )}$ with the constraints $t>0$, $0<\theta <\frac{\pi}{2}$, $4.5<0.9+10.5\tan (\theta )-\frac{9.8}{2}t^2$ (coming from just basic kinematics) May14 awarded Yearling May14 awarded Nice Answer May18 awarded Constituent May17 awarded Caucus Nov24 awarded Custodian Nov24 reviewed Reviewed Superball total bounce distance Nov23 awarded Critic Nov23 awarded Student Oct28 revised How to calculate the integral in normal distribution? fix typo Oct21 awarded Scholar Oct21 comment Find the volume of a solid by integration Thanks for your help