What is expand (3+cos(θ))^2 ?

The solution to expand (3+cos(θ))^2 is 9+6cos(θ)+cos^2(θ)

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expand (3+cos(θ))^2

expand

(3 + cos (θ))^{2}

9 + 6 cos (θ) + cos^{2} (θ)

Solution steps

(3 + cos (θ))^{2}

Apply Perfect Square Formula:

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

(3 + cos (θ))^{2} = 3^{2} + 2 \cdot 3 cos (θ) + cos^{2} (θ)

= 3^{2} + 2 \cdot 3 cos (θ) + cos^{2} (θ)

Simplify

3^{2} + 2 \cdot 3 cos (θ) + cos^{2} (θ) : 9 + 6 cos (θ) + cos^{2} (θ)

= 9 + 6 cos (θ) + cos^{2} (θ)

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

(t + 1) i

(3 + cos (θ))^{3}

\frac{d ^{2}}{d y ^{2}} ((S) (3 - \frac{147}{y ^{2}}))

(4 x^{2} + 5 x + 5)^{5}

What is expand (3+cos(θ))^2 ?
The solution to expand (3+cos(θ))^2 is 9+6cos(θ)+cos^2(θ)