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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