The value of tan 15°/2-sec^2 15°=? Answer is 1/2 root 3 Share with your friends Share 4 Anuradha Sharma answered this Assuming the question as, tan152-sec215=2tan1522-sec215=12×2tan151-sec215-1=12×2tan151-tan215 Using the formula sec2A-1 =tan2A= 12×tan2×15 Using tan2x = 2tanx1-tan2x=12×tan30= 12×13=123 24 View Full Answer