Transformation of Identities (cont.)#!#Finding the Unknown variable

finding term independent of variable

Equation a statement of equality which contains one or more unknown quality or variable ( literals) is called an equation

The following pairs of triangles are congruent. Find the lengths of the unknown sides.

Finding unknown when limit is given

A metallic surface is irradiated with monochromatic light of variable wavelength. Above a wavelength of 5000 Å no photoelectrons are emitted from the surface. With an unknown wavelength, stopping potential fo 3V is neceddsry ot eliminate the photocurrent. Find the unknown wavelenght.

Every elementary row/column transformation of an mxn( not identity) can be obtained by pre-multiplication (post-multiplication) with the corresponding elementary matrix obtained from the identity matrix I_(m)(I_(n)) by subjecting it to the same elementary row(column) transformation.

Find the unknown angle in the following:

In the adjoining figure,p||q. Find the unknown angles.