What is cos^2(pix)-sin^2(pix) ?

The solution to cos^2(pix)-sin^2(pix) is cos(2pix)

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simplify cos^2(pix)-sin^2(pix)

simplify

cos^{2} (π x) - sin^{2} (π x)

cos (2 π x)

Solution steps

cos^{2} (π x) - sin^{2} (π x)

Use the Double Angle identity:

cos^{2} (x) - sin^{2} (x) = cos (2 x)

= cos (2 π x)

7^{2} + (- 7 tan (t))^{2}

tan (x - π) + 2 sin (x - π)

cos (3 π - x)

tan (\frac{π}{2} - 2 x)

cos^{2} (5 x + \frac{π}{3})

What is cos^2(pix)-sin^2(pix) ?
The solution to cos^2(pix)-sin^2(pix) is cos(2pix)