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Proof of the Difference Formula for Sine and of the Addition Formula for Cosine
This Demonstration shows a proof of the difference formula for sine,
and a proof of the addition formula for cosine,
using the formula
.
Contributed by:
Izidor Hafner
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RELATED LINKS
Addition Formula for Sine
(
Wolfram Demonstrations Project
)
Difference Formula for Cosine
(
Wolfram Demonstrations Project
)
Trigonometric Functions
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Proof of the Difference Formula for Sine and of the Addition Formula for Cosine
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/ProofOfTheDifferenceFormulaForSineAndOfTheAdditionFormulaFor/
Contributed by:
Izidor Hafner
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Related Curriculum Standards
US Common Core State Standards, Mathematics
HSF-TF.C.9