Answer: 
Step-by-step explanation:
1. The problem asked for the product of
and
, therefore, you must mutliply them, as you can see below:
2. According the exponents propertiess, when you have a multiplication of two powers that has the equal base, you must add the exponents. THerefore, you have the following result:
B. sinC= cosA
Remember SohCahToa.
The sine is equal to opposite/hypotenuse and cosine is equal to adjacent over hypotenuse.
The sine of C is 12/13 and the cosine of A is 12/13.
Answer: f=26
Step-by-step explanation: x^2+6x^2+12x+7/x= 26