Skills and Applications Verifying a Trigonometric Identity In Exercises 5-14, verify the identity. 6 5 tan cott = 1 7. 8. cos B Sin B=2 cos-p-1 9. cos -sin = 1 - 2 sin 10. sin a - sin a = cos a - cos4 a e-cos 8 n x 14. Verifying a Trigonometric Identity In Exercises 15-20, verify the identity algebraically. Use the table feature of a graphing utility to check your result numerically. 1 1 15. + = tan x + cot x tan x cotx 1 1 16. sin x 1 + sin 0 = csc x - sin x CSC X COS 17. + = 2 sec 0 cos 1 + sin 0 cos cot 1 18. 1 - sin 0 1 = csc 0