Course CMPSCI 287

Due 11:59 PM, 9 FEB 99 as hwk1.scm

Write a Scheme Function cosrule which uses the cosine rule to work out the length of one side c of a triangle given the lengths a,b of the other two sides and the included angle t between them. The function call should be
    (cosrule a b t)
and it should return the length of the side as a result. (example '(cosrule 10 10 0) 0.0)