Exact values of $x$ for $2\cos^2x=1+\sin x$
59791
Determine the exact value of equations involving more two trig variables
29370
Trig integral $\int ( \cos{x} + \sin{x}\cos{x}) \, dx $
65093
Integrate $\int \sin^4x \cos^2x dx$
57750
Solve identity: $\frac {\sin x}{1-\cos x} = \frac {1+\cos x}{\sin x}$
51729
Solve the following equation: $\sqrt {\sin x - \sqrt {\cos x + \sin x} } = \cos x$
82586
Why is cos -x equal to cos x?
48824
Prove: $ \frac{1}{\sin 2x} + \frac{1}{\sin 4x } + \cdots + \frac{1 }{\sin 2^n x} = \cot x - \cot 2^n x $
27628
Solving $a \sin\theta + b \cos\theta = c$
82321
Is $\cos(x) \geq 1 - \frac{x^2}{2}$ for all $x$ in $R$?
99584
Evaluation of $\int \frac{\sqrt{\sin ^4x+\cos ^4x}}{\sin ^3x \cos x }dx$
138575
Proof that $\cos^2(x)\cosh^2(y) + \sin^2(x)\sinh^2(y) = -1 + \sin^2(x) - \sinh^2(y)$
123476
Prove $[\sin x]' = \cos x$ without using $\lim\limits_{x\to 0}\frac{\sin x}{x} = 1$
144811
Calculate $\int_0^{2\pi} \frac{1}{2+\sin(x)} \ dx$
60774
Find the value of : $\cos x \cos 2x...\cos 999x$ given that $x=\frac {2\pi}{1999}$
108245
Solving the complex equation $\sin(z) = \cos(z)$
87934
Deducing $\sin x + \cos x \ge 1$ from $(\sin x + \cos x)^2 = 1 + 2 \sin x \cos x$
29424
Maximum value of $\sin A+\sin B+\sin C$?