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What is the value of $$\sin^2 45^\circ + \cos^2 45^\circ$$?
It is in the form of trigonometric identity
$$\sin^2\theta\ +\cos^2\theta\ =1$$
$$=$$> $$\sin^245^{\circ\ }+\cos^245^{\circ\ }\ =1$$
Hence, the correct answer is Option B
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