[" hapter "boldsymbol B],[" Atoms AND MOLECULES "]

In a hat boldsymbol QABC, right angled at A, if AB=12,AC=5 and BC=13, find all the six trigonometric ratios of angle B.

The angles of a hat boldsymbol QABC are in A.P.(order being A,B,C) and it is being given that b:c=sqrt(3):sqrt(2), then find /_A

Solve x^(2)-4-[x]=0 (where [boldsymbol phi] denotes the greatest integer function).

Solve | boldsymbol x|=x^(2)-1

Statement 1: For a singular square matrix A,AB=AChat boldsymbol varphi B=C. Statement 2;|A|=0, then A^(-1) does not exist.

Atoms & molecule

[" QUES "NO.-8" ,"],[" Minor of an element of a determinant of order "n(boldsymbol n>=2)" is a determinant of order "],[[" a."n," b."n-1," c."n-2," d."n+1],[" a "," b "]],[" c "," d "]

In a hat boldsymbol QABC,/_B=90^(@) and b+a=4. The area of the triangle is maximum when /_C is (pi)/(4) (b) (pi)/(6)(pi)/(3)(d) none of these

A molecule is made up of atoms .