Help if you dont knpow pls dont give random answers give me a senctence not just the answer here 30 points

What is sin 7x/4 ? i need on this urgent trig

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.