If $$\alpha$$, $$\beta$$ and $$\gamma$$ are the angles which the vector OP (O being the origin) makes with positive direction of the coordinate axes, then which of the following are correct?

1. $${\cos ^2}\alpha + {\cos ^2}\beta = {\sin ^2}\gamma $$

2. $${\sin ^2}\alpha + {\sin ^2}\beta = {\cos ^2}\gamma $$

3. $${\sin ^2}\alpha + {\sin ^2}\beta + {\sin ^2}\gamma = 2$$

Select the correct answer using the code given below.

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