CBSE BOARD XII, asked by madhu637257, 8 months ago

find the value plz help me

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Answered by mechie88

1

Explanation:

Solvong determinant cos10*cos100 - (-sin10*sin100)

= cos10*cos100 + sin10*sin100

This is cos(A-B) which is cosAcosB + sinAsinB

=> cos(100-10) = cos90 = 0

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