Sec theta . cosec theta = tan theta

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

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

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°