Comment #8 on issue 1368 by smi...@gmail.com: solve((a**2 + 1) * (sin(a*x) + cos(a*x)), x) fails
http://code.google.com/p/sympy/issues/detail?id=1368

Here are some new solutions, then, made possible by rewriting in tan or tanh:

```python

[3*pi/(4*a), -pi/(4*a)]

[2*atanh(1/2)/a]

[2*atanh(-1 + sqrt(2))/a, 2*atanh(-sqrt(5)/2 + 1/2)/a, 2*atanh(-sqrt(2) - 1)/a,
2*atanh(1/2 + sqrt(5)/2)/a]

[pi/4, -3*pi/4]
```

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