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)

15 (- \frac{1}{2 t ^{2}} + \frac{1}{2})

\frac{2 ( sin ( 2 x ) + 1 )}{3 cos ^{2} ( 2 x )}

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

(15 + x) (\frac{15 + x}{2})^{2}

+ 10 y^{2} a t (2, 1, - 14)

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