Question

Sendo sec x = 2, determine o valor de sen x

Answer 1

secx = 2 => cosx = 1/2
sen²x + cos²x = 1
sen² x + (1/2)² = 1
sen²x + 1/4 = 1
sen²x = 1 - 1/4
sen²x = 3/4
senx = -√3/2 ou senx = √3/2