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Popular >

simplify 2cos^2(a)-1

Solution

simplify

2 cos^{2} (a) - 1

Solution

cos (2 a)

Solution steps

2 cos^{2} (a) - 1

Rewrite using trig identities

= cos (2 a)

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Frequently Asked Questions (FAQ)

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