What is 2cos^2(x)+cos(x)-1 ?

The solution to 2cos^2(x)+cos(x)-1 is cos(2x)+cos(x)

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simplify 2cos^2(x)+cos(x)-1

simplify

2 cos^{2} (x) + cos (x) - 1

cos (2 x) + cos (x)

Solution steps

2 cos^{2} (x) + cos (x) - 1

Rewrite using trig identities

= cos (2 x) + cos (x)

\frac{( - 5 x ^{2} ) ^{5}}{( - 3 x ) ^{2}}

\frac{( a - b ) ^{3} + ( b - c ) ^{3} + ( c - a ) ^{3}}{( a - b ) ( b - c ) ( c - a )}

6 y^{5} \cdot w^{6} \cdot 3 y^{7} \cdot w^{5}

\frac{3 ^{x} + 3 ^{- x} - 2}{x ^{2}}

169 m^{12} - 100 n^{6}

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