Two sides of a parallelogram are 30 and 20. One diagonal has a length of 40. What is the length of the other diagonal?
+118608 Two sides of a parallelogram are 30 and 20. One diagonal has a length of 40. What is the length of the other diagonal?
Use the cosine rule to find cos(theta) then get back to me. [ note:I want cos(theta), not theta ]
If you have cos(theta), what is the value of cos(180-(theta)) ?\(\)
