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Popular >

simplify cos^2(a)-1

Solution

simplify

cos^{2} (a) - 1

Solution

- sin^{2} (a)

Solution steps

cos^{2} (a) - 1

Use the Pythagorean identity:

1 = cos^{2} (x) + sin^{2} (x)

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

= - sin^{2} (a)

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Frequently Asked Questions (FAQ)

What is cos^2(a)-1 ?
The solution to cos^2(a)-1 is -sin^2(a)