- The angle θ lies in Quadrant I. sinθ=2/5 What is cos θ? −2/5 2/5 (−√21)/(5) (√21)/(5)?

Discover Questions

Is IR helpful to prove that limonene is optically active? Why or why not? Will a precipitate form if 40 mL of 1 * 10^-4 M HgNO3 is mixed with 20 mL of .005 M K2CrO4? The Ksp of HgCrO4 = 1 * 10^-7? Zn+ AgCl yields ZnCl2+ Ag balance? How do I prove y = mx + c is the equation of a straight line? Quadrilateral ABCD is inscribed in circle O. What is m∠C ?