1.

(33) in the relation x = A cos (wt + kx), thedimensions of w are(b) IMPL-1T01(d) IMOLT-12

Answer»

Anything inside trigonometric identities have no dimension (radian and degree are dimensionless ) . So ‘wt’ should have no dimension , since dimension of ‘t' is sec, thus dimension of w is sec^-1 or 1/sec.

Or simple w= 2*pi/time

2*pi is dimensionless, this dimension of w is 1/secso option c is the correct answer



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