Browsing by Australian Curriculum Mathematical Methods
establish the formulas ddx(sinx)=cosx, and ddx(cosx)=−sinxddxsinx=cosx, and ddxcosx=-sinx by numerical estimations of the limits and informal proofs based on geometric constructions
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establish the formulas ddx(sinx)=cosx, and ddx(cosx)=−sinxddxsinx=cosx, and ddxcosx=-sinx by numerical estimations of the limits and informal proofs based on geometric constructions
