Use an appropriate half-angle formula to find the exact value of the expression. cos(13i/8)

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !