Please help ASAP with one or the rest pleasee I’ll l mark you as brainlister

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.