I need help with this question

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

Simplify each expression using the definition, identities, and properties of imaginary numbers. match each term in the list on the left to its equivalent simplified form on the right. 1. (i 3)2(-i 0)3(3i 2)4 -4 2. (i 3i -5)2(i 4i -3)0 1 3. (-i 4i 2)(2i)2(i -1i 5)3(i 0)-3 -i 4. i 3[(i 2i 3i 4)(i 0i 2i 5)]2 81