1^2 + 1^2 + 1^2 + 1^2 + 1^2 + 1^2 = 1 + 1 + 1 + 1 + 1 + 1 = 5
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1 squared (1x1) +3=4
Yes. 'sin2x + cos2x = 1' is one of the most basic identities in trigonometry.
8 + X SQUARED
Cosine squared theta = 1 + Sine squared theta