2. Show that (a) S' = {z = a + bi E C|a, b € R, |2| = a² + b² = 1} is a subgroup of C*. %3D
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- Let H1={ [ 0 ],[ 6 ] } and H2={ [ 0 ],[ 3 ],[ 6 ],[ 9 ] } be subgroups of the abelian group 12 under addition. Find H1+H2 and determine if the sum is direct.Prove or disprove that H={ hGh1=h } is a subgroup of the group G if G is abelian.Prove that the mapping from R under addition to SL(2,R) that takes x to [ cos x sin x -sin x cos x] is a group homomorphism. Find the kernel.
- Prove that H x {1} and {1} x K are normal subgroups of H x K, that these subgroups general H x K, that their intersection is {(1,1)}, and that the elements (h,1) and ( 1,k) commute each otherCan you plz help with (i) Its group theory problemHow do I find the order of the cyclic subgroup of S3 as in c) ?
- Let sin A = 3/5 with A in QI and cos B = −5/13 with B in QIII. Find: Group of answer choices tan A [ Choose ] 2.4000 -3.9375 0.7500 tan B [ Choose ] 2.4000 -3.9375 0.7500 tan (A + B) [ Choose ] 2.4000 -3.9375 0.7500If f: Z -> Z is the map defined by f(x) = 2x. Is f a group homomorphism when the group operation on Z is addition? How would you prove it?How would you solve such a question: Suppose f : Z → Z5 is a group homomorphism, and suppose f (3) = 2.Find f (1).