What is expand (2+cos(θ))^2 ?

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

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expand (2+cos(θ))^2

expand

(2 + cos (θ))^{2}

4 + 4 cos (θ) + cos^{2} (θ)

Solution steps

(2 + cos (θ))^{2}

Apply Perfect Square Formula:

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

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

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

Simplify

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

= 4 + 4 cos (θ) + cos^{2} (θ)

\frac{z + 1}{z ^{2} ( z - 1 )}

(x + 1) ln (x + 1)

(1 - i)^{11}

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

(x - y) d x + (x + y) d y

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