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|["cos"15^(@), "sin"15^(@)], ["sin"15^(@...

`|["cos"15^(@), "sin"15^(@)], ["sin"15^(@), "cos"15^(@)]|=?`

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Evaluate |["cos" 15^(@), "sin"15^(@)],["sin" 75^(@), "cos"75^(@)]|

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