2) Find the value of (-2)*(-1)
a) 2
b) -2
c) -1
d)1

If (sin^(-1) a)^(2) +( cos^(-1) b)^(2) + ( sec^(-1)c)^(2) + ( cosec^(-1) d)^(2) = ( 5pi^(2))/2 " , then the value of " ( sin^(-1)a)^(2) - ( cos^(-1)b) ^(2) + ( sec^(-1)c)^(2) - ( cosec^(-1)d)^(2)

If sinA+sin^2A=1, then the value of cos^2A+cos^4A is (a)2 (b) 1 (c) -2 (d) 0

If a , b , c are consecutive positive integers and (log(1+a c)=2K , then the value of K is (a) logb (b) loga (c) 2 (d) 1

If the rank of the matrix [[-1,2,5],[2,-4,a-4],[1,-2,a+1]] is 1 then the value of a is (A) -1 (B) 2 (C) -6 (D) 4

The approximate value of (33)^(1//5) is (a) 2.0125 (b) 2.1 (c) 2.01 (d) none of these

If cotA+cotB+cotC = k(1/x^2+1/y^2+1/z^2) then the value of k is (A) R^2 (B) 2R (C) /_\ (D) a^2+b^2+c^2

Find the value of a if [a-b2a+c2a-b3c+d]=[-1 5 0 13]

If |(a^2,b^2,c^2),((a+1)^2 ,(b+1)^2,(c+1)^2),((a-1)^2 ,(b-1)^2,(c-1)^2)| =k(a-b)(b-c)(c-a) then the value of k is a. 4 b. -2 c.-4 d. 2

If 49 a^2-b=(7a+1/2)\ \ (7a-1/2), then the value of b is =? (a) 0 (b) 1/4 (c) 1/(sqrt(2))\ (d) 1/2

When a=3 , b=0 , c=-2 , find the value of : 1/2a^4 + 2/3b^2c^2 - 1/9a^2c^2 +c^3 .