The value of `(2^1-2^2)^2 =`

The value of (-2)^(2xx3-1)

If 1+2+3+……+n=28 , then the value of 1^(2)+2^(2)+3^(2)+………..+n^(2) is (i) 560 (ii) 280 (iii) 140 (iv) None of these

The value of (-2)^(2*3-1) is

The value of 1^(2) + 3^(2) + 5^(2) + ..... + 25^(2) is

Find the value of (1-2sin^(2)30^(@)) .

The value of 2xx2^(1//2)xx2^(1//4)xx2^(1//8)xx ….xx oo is (i) 4 (ii) sqrt(2) (iii) 2sqrt(2) (iv) 8

If cosx/2dotcosx/(2^2)dotcosx/(2^3)oo=(sinx)/x , then find the value of 1/(2^2)sec^2x/2+1/(2^4)sec^2x/(2^2)+1/(2^6)sec^2x/(2^3)+oo

The value of 2sec^(-1) 2 + 2 sin^(-1)(1/2) is

If 1 , z_1 , z_2 ,......., z_6 are the 7th roots of unity then the value of (2-z_1)(2-z_2)(2-z_3)(2-z_4)(2-z_5)(2-z_6)= (a) 63 b. 127 c. 32 d. 31

The value of 2cos^(-1)(-1/2)-2 sin^(-1)(-1/2)-cos^(-1)(-1) is