Find the derivative of f(x)= (e^ax)*(cos(bx)) using chain rule

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?