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Popular >

simplify cos(9pi+a)

Solution

simplify

cos (9 π + a)

Solution

- cos (a)

Solution steps

cos (9 π + a)

Rewrite using trig identities

= - cos (a)

Popular Examples

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Frequently Asked Questions (FAQ)

What is cos(9pi+a) ?
The solution to cos(9pi+a) is -cos(a)