no. of rel solution in Trig. equation

[stuart clark]

[1] Total no. of real solution of $\sin (\sin x) = \cos (\cos x)$ , where $x\in \left[0,2\pi\right]$

[2] Total no. of real solution of $\sin (\sin (\sin x)) = \cos (\cos (\cos x))$ , where $x\in \left[0,2\pi\right]$

[3] Total no. of real solution of $\sin (\sin (\sin (\sin (\sin x)))) = \cos (\cos (\cos (\cos (\cos x))))$ , where $x\in \left[0,2\pi\right]$

[alpercay]

For your [2]  see  http://geomania.org/forum/fantezi-cebir/trig-equation/msg10038/#msg10038  and I think you repeat your questions.

[stuart clark]

Thanks Admin.

would you like to explain me (3)rd one.