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sin h-1 x =

1) log [x + √1 - x2] 2) log [x + √x2 + 1] 3) log [x + √x2 - 1] 4) None of these Solution: (2) log [x + √x2 + 1] x = sin ht t = sin h-1 x... View Article

The period of cos h (4x) is

1) 2πi 2) πi 3) πi / 2 4) 2π Solution: (3) πi / 2 cos h (4x) = cos h (2πi + 4x) = cos h 4 [(πi / 2) + x] The period is πi / 2.... View Article

The period of cot h (nx / 4) is

1) πi / n 2) 4πi / n 3) nπi / 4 4) πi Solution: (2) 4πi / n cot h (nx / 4) = cot h [(πi + (nx / 4))] = cot h (n / 4) [4 * (πi / n) + x] The... View Article

sin2 ix + cos h2 x =

1) 1 2) -1 3) 2 cos h2 x 4) cos hx Solution: (1) 1 sin ix = i sin hx sin2 (ix) = (i sin hx)2 = - sin h2 x sin2 (ix) + cos h2 x = cos h2 x -... View Article

Why are free radicals bad

Free radicals are the molecules with unpaired electrons and they are unstable. Since they are unstable, they will constantly try to bind with... View Article

Is HCl a hydride

Covalent hydrides are formed when hydrogen combines with one or more nonmetals to form a compound. Hydrochloric acid (HCl), in which hydrogen... View Article