What is expand (2+cos(t))^2 ?

The solution to expand (2+cos(t))^2 is 4+4cos(t)+cos^2(t)

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expand (2+cos(t))^2

expand

(2 + cos (t))^{2}

4 + 4 cos (t) + cos^{2} (t)

Solution steps

(2 + cos (t))^{2}

Apply Perfect Square Formula:

(a + b)^{2} = a^{2} + 2 ab + b^{2}

(2 + cos (t))^{2} = 2^{2} + 2 \cdot 2 cos (t) + cos^{2} (t)

= 2^{2} + 2 \cdot 2 cos (t) + cos^{2} (t)

Simplify

2^{2} + 2 \cdot 2 cos (t) + cos^{2} (t) : 4 + 4 cos (t) + cos^{2} (t)

= 4 + 4 cos (t) + cos^{2} (t)

(2 y + x) d y + y d x

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

\frac{x ^{2} + 2 x + 8}{( x - 2 ) ( x + 2 )}

cos ((t^{2}) (s - 2 t))

\frac{2 e ^{- x}}{x ^{3} ( x ^{2} + 1 )}

What is expand (2+cos(t))^2 ?
The solution to expand (2+cos(t))^2 is 4+4cos(t)+cos^2(t)