Sin a= -5/13, cos b =4/5 and a and b are in the fourth quadrant, find the exact value.

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.