What is expand (r-rcos(θ))^2 ?

The solution to expand (r-rcos(θ))^2 is r^2-2r^2cos(θ)+r^2cos^2(θ)

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expand (r-rcos(θ))^2

expand

(r - r cos (θ))^{2}

r^{2} - 2 r^{2} cos (θ) + r^{2} cos^{2} (θ)

Solution steps

(r - r cos (θ))^{2}

Apply Perfect Square Formula:

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

(r - r cos (θ))^{2} = r^{2} - 2 rr cos (θ) + (r cos (θ))^{2}

= r^{2} - 2 rr cos (θ) + (r cos (θ))^{2}

Simplify

r^{2} - 2 rr cos (θ) + (r cos (θ))^{2} : r^{2} - 2 r^{2} cos (θ) + r^{2} cos^{2} (θ)

= r^{2} - 2 r^{2} cos (θ) + r^{2} cos^{2} (θ)

2 (32 + 2)

7 (1 + 6 sin (θ))^{2}

\frac{( 10 - 3 x ) ( x + 1 )}{5}

10 (A \cdot cos (5 x) - A \cdot sin (5 x))

e^{(- 2 + i 25) \cdot 0.01}

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