Answer :
The complete values are:
sin 40 = 6.43/10
cos 40= 7.66/10
tan 50 = 6.43 / 7.66
tan 60 = 7.66/ 6.43
Using Trigonometry
sin 40 = Perpendicular / Hypotenuse
sin 40 = 6.43/10
Now, cos 40 = Base / Hypotenuse
cos 40= 7.66/10
Now, tan 50 = Perpendicular / Base
tan 50 = 6.43 / 7.66
Now, tan 60 = Perpendicular / Base
tan 60 = 7.66/ 6.43
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