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11h
answered Operation on inverse trigonometric functions
18h
answered Find $\int (\sin^2 x - 2\cos^2 x)\,dx$
19h
answered solve $\sin(z)=-1$ in the set of complex numbers
1d
answered Find $ \lim_{x\to 0} \left(\frac {\tan x }{x} \right)^{\frac{1}{x^2}}$.
May
1
answered If $y=9\sec^2x+16\csc^2x$,find the minimum value of $y$
May
1
answered Solve $2\cos x + 1 = 0$ for x, where $\pi \le x \le \frac{3\pi}{2}$
May
1
answered Evaluate the $\lim_{x \to \ -\infty} (x + \sqrt{x^2 + 2x})$
May
1
answered Find how many solutions the congruence $x^2 \equiv 121 \mod 1800$ has
May
1
answered $ 1^k+2^k+3^k+…+(p-1)^k $ always a multiple of $p$?
May
1
answered How to maximize the product xy?
May
1
answered Given $\tan a = -7/24$ in $2$nd quadrant and $\cot b = 3/4$ in $3$rd quadrant find $\sin (a + b)$.
May
1
answered Unseen Theorem Based on parallelogram
Apr
30
answered Maximum of $xy+y^2$ subject to right-semicircle $x\ge 0,x^2+y^2\le 1$
Apr
30
answered Prove that $\int_{0}^{\frac{\pi}{2}}{\frac{\sin(2n+1)x}{\sin(x)}dx}=\frac{\pi}{2}$ for $n\ge0$
Apr
30
answered Multiplying two logarithms (Solved)
Apr
30
answered Antiderivative of y = $\dfrac {x+22} {x^{2}+2x-8}$
Apr
30
answered Solving $\arcsin\left(2x\sqrt{1-x^2}\right) = 2 \arcsin x$
Apr
29
answered Solving $\arcsin(\sqrt{1-x^2}) +\arccos(x) = \text{arccot} \left(\frac{\sqrt{1-x^2}}{x}\right) - \arcsin( x)$
Apr
29
answered What would be the value of the limit $\lim _{x\to \infty} (\frac{3x +1}{3x-1})^{4x}$?
Apr
25
answered Solve $\cot^2(x) -\cot(x) - 1=0$