Why does sine squared plus cosine squared equal 1?

"Visualizing the Identity: Understanding sin⁡2x+cos⁡2x=1\sin^2 x + \cos^2 x = 1,sin2x+cos2x=1

How to prove that sin^2 x+ cos^2 x = 1 | [ Trigonometry ]

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微積分学入門 - 三角法：三角関数の等式（57問中30問）証明 sin^2(x)=(1-cos2x)/2

sin^2(x) + cos^2(x) = 1 Trig Identity Graphical Proof

why sin(2x)=2sin(x)cos(x)

sin^2x+cos^2x=1 Proof |Mad Teacher

What does sine actually mean?

Find dy/dx if sin^2x+cos^2y=1

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Trigonometry Identity: Proof that sin^2(x) + cos^2(x) = 1

Why sin^2 x + cos^2 x = 1

😳 CLEAN BASIC CALCULUS Differentiate d/dx(sin2x)=? #Shorts

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How To Find The Derivative of Sin^2(x), Sin(2x), Sin^2(2x), Tan3x, & Cos4x

How to prove that cos^2x - sin^2x = 1 - 2sin^2x

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