plz help fast!!!!!!!.!,
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
using a^2-b^2=(a+b)(a-b)
cot^2=cosec^2-1
tan^2=sec^2-1
and then only simple multiply