BFill in the blanks.1...............is sorting of materials on the bas

1.	BFill in the blanks.1...............is sorting of materials on the basis of a particular property.2. Materials can be grouped as...............and ............on the basis of their occurrence.3.................is a man-made material.4. All metals have..............5. Heavy objects...................in water
Answer» cos²A+sin²A=1 Therefore, cos²A = 1-sin²A, i.e., COSA = $\<klux>FRAC</klux>{ + }{} \sqrt{1 - sin {}^{<klux>2</klux>} \: a }$ This gives cosA = $\sqrt{1 - sin {}^{2} a}$ HENCE, TANA = [tex] \frac{sin \: a}{cos \: a} = \frac{sin \: a}{ \sqrt{1 - sin {}^{2} } \: