The cosine of 90 degrees is zero.
The cosine of 8 degrees is 0.99026806874157031508377486734485
Cosine is 0.766
The cosine of 24 degrees is 0.913
cosine(59 degrees) = 0.51504 (rounded)
The cosine of 20 degrees is 0.93969262
The cosine of 90 degrees is zero.
The cosine of 8 degrees is 0.99026806874157031508377486734485
Cosine is 0.995
Cosine is 0.766
The cosine of 60 degrees is 0.5
The cosine of 24 degrees is 0.913
You cannot. The cosine of 30 degrees is an irrational number.
Cosine(42 radians) = -0.399985 Cosine(42 degrees) = 0.743146
Cosine(84 radians) = -0.680023 Cosine(84 degrees) = 0.104528
cosine(59 degrees) = 0.51504 (rounded)
Treat it as being two right angled triangles by halving the base and use the cosine ratio to find its hypotenuse (which will be one of the equal sides) cosine = adjacent/hypotenuse hypotenuse = adjacent/cosine hypotenuse = 6/cosine 20 degrees = 6.385066635 The length of the equal sides = 6.4 units correct to one decimal place.