Answer:
zero.
Step-by-step explanation:
To find the value of the expression we need the help of a calculator:
cos 140°= -0,76
sin 10° = 0,17
cos 70° = 0.34
sqrt root (3) = 1.73
Therefore,
cos 140° + sin 10° + sqr root (3) cos 70° = -0,76 + 0,17 + 1.73*0.34 = 0
Therefore the result is zero.
