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Jul
28
revised Calculate $\int\left( \sqrt{\tan x}+\sqrt{\cot x}\right)dx$
You cannot use the identity arctan(a) + arctan(b) when ab>1.....for doing that you must convert them as pi/2-arccot(a) and then as arctan(1/a).......so the result would be as shown....i think it should be tanx-1 not 1-tanx
Jul
28
reviewed Reject Proper way to solve function notations?
Jul
28
reviewed Reject How to find perpendicular vectors in 3D
Jul
28
reviewed Approve remainder of $a^2+3a+4$ divided by 7
Jul
28
reviewed Approve How do I solve a linear system with two variables and three equations?
Jul
28
reviewed Approve The square of n+1-th prime is less than the product of the first n primes.
Jul
28
reviewed Approve Why does the electromagnetic tensor $F$ satisfy $**F = -F$?
Jul
28
reviewed Approve Proving $a=b \bmod 19$ is an equivalence relation
Jul
28
revised What three odd integers have a sum of 30?
Answer should not come in a point format only 3 integers
Jul
28
reviewed Approve If a professor has 7 students and they have to at least do 2 assignments each…
Jul
27
reviewed Approve Calculus: Finding Arc Length--Squaring the Derivative Where did the -1/2 come from?
Jul
27
reviewed Reject Calculus: Finding Arc Length--Squaring the Derivative Where did the -1/2 come from?
Jul
27
reviewed Approve What do you call this thing in probability theory?
Jul
27
reviewed Reject Matrix Properties Problem
Jul
27
reviewed Approve The sum of three natural numbers are $111$, and the three numbers are in geometric progression.
Jul
27
reviewed Approve Let $H$ be normal subgroup of $G$. If $G/H$ is cyclic group generated by $aH$, prove that $G=KH$ where $K=\langle a\rangle$.
Jul
27
reviewed Approve What is the relation between cohomology of $K(\mathbf{Z}_2, n)$ and $K(\mathbf{Z}_2, n+1)$?
Jul
27
reviewed Reject All natural numbers $m, n$ such that $m = \sqrt{\frac{1}3A^2 - 3n^2}$
Jul
27
reviewed Reject Find the volume of the parallelepiped.
Jul
27
reviewed Approve Find the rate of change in x