Derivative of sin(x) and cos(x), PROOF

Geometric proof of sin(x)/x approaches 1 as x approaches 0, • The Limit (do not use ...
Angle sum formula: • Angle sum identities f...
part1: derivative of sin(x) and cos(x), • Derivative of sin(x) a...
part2: derivative of tan(x) and cot(x), • derivatives of tan(x) ...
part3: derivative of sec(x) and csc(x), • derivative of sec(x) a...
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