Tan20×tan40 tan60×tan80=3 prove that

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

If 3x+8=3x+8 is it one solution or no solution

Can someone me do math because i am having a breakdown rn because i don’t get it