What is cos^2(β)-sin^2(β) ?

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

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simplify cos^2(β)-sin^2(β)

simplify

cos^{2} (β) - sin^{2} (β)

cos (2 β)

Solution steps

cos^{2} (β) - sin^{2} (β)

Use the Double Angle identity:

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

= cos (2 β)

x^{4} - 8 x^{3} + 13 x^{2} + 12 x - 10

\frac{5}{12} + \frac{7}{18}

7 - 16

8 + \frac{1}{4}

1 + 3.22 lo g_{10} (30)