What is simplify-cos(x+pi)+cos(x) ?

The solution to simplify-cos(x+pi)+cos(x) is 2cos(x)

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simplify-cos(x+pi)+cos(x)

simplify

- cos (x + π) + cos (x)

2 cos (x)

Solution steps

- cos (x + π) + cos (x)

Rewrite using trig identities

= - (- cos (x)) + cos (x)

Simplify

- (- cos (x)) + cos (x) : 2 cos (x)

= 2 cos (x)

2 tan^{2} (x) + 2

- 3 cos (t - π) + sin (t - π)

cot (\frac{π}{5} - x)

tan (\frac{21 π}{2} - x)

sin (arcsin (3 x))

What is simplify-cos(x+pi)+cos(x) ?
The solution to simplify-cos(x+pi)+cos(x) is 2cos(x)