CosA=3/5 and sinB=5/13 then sec(A+B) is?

put like terms together.orremember that the 45 becomes negative when moved to the other side.orthe minuses cancel out.

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*