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[" Q21.The value of "|[cos15^(@),sin15^(...

[" Q21.The value of "|[cos15^(@),sin15^(@)],[sin75^(@),cos75^(@)]|?],[[" (a) "1," (b) "1/sqrt(2)," (c) "sqrt(3)/2," (d) "0]]

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The value of cos15^(@)-sin15^(@) is

Evaluate |(cos 15^(@),sin15^(@)),(sin75^(@),cos75^(@))|

Evaluate det[[cos15^(@),sin15^(@)sin75^(@),cos75^(@)]]

The value of cos15^@-sin15^@ is

Evalute |(cos 15^(@) sin 15^(@)),(sin 75^(@) cos 75^(@))|

Evaluate: |(cos15^@,sin15^@),(sin75^@,cos75^@)|

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

Evaluate: det[[cos15^(0),sin15^(0)sin75^(0),cos75^(0)]]

Evaluate: |[cos15^@ sin15^@],[sin75^@cos75^@]| .

cos15^(@)-cos75^(@)=