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- Ceva’s Theorem Is More Than a Formula for Concurrency
- The Chain Rule Explained: Don't Just Memorize, Visualize It
- The Intuition Behind Integration by Parts (Proof & Example)
- Statics
- Calculus
- Hydraulics: Rotating Vessel
- Hydraulics: Water is flowing through a pipe
- Inverse Trigo
- Problems in progression
- General Solution of $y' = x \, \ln x$
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Re: proving
Let
y = arccos x
cos y = x
Let
z = arcsin x
sin z = x
Hence,
cos y = sin z
cos y = cos (pi/2 - z)
y = pi/2 - z
arccos x = pi/2 - arcsin x <-- proven