the value of cos 48 degree minus sin 42 degrees
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cos48 - sin42
cos(90 - 42 ) - sin42
sin42 - sin42 = 0 ...... ( cos90 - theta = sin theta )
cos(90 - 42 ) - sin42
sin42 - sin42 = 0 ...... ( cos90 - theta = sin theta )
Answered by
2
bcoz,
sin(90-A)=cosA
cos48-sin42
cos(90-48)-sin42
sin42-sin42
0
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