Question

$cos ^{2} \pi x + \sin^{2} \pi x$
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Answer 1

Hey Mate!

Your answer is 1.

Answer 2

We have the formula

sin²(x) + cos²(x) = 1

Which means,

sin²(any angle) + cos²(any angle) = 1

So, for angle πx

sin²(πx) + cos²(πx) = 1