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How do I find the length of a side of a triangle using the cosine rule?

Suppose we have a triangle with 2 sides of length 4 and 5 (in any units), and the angle between those sides is 60 degrees. We want to find the length of the side opposite the 60 degree angle. Write the cosin...
AH
Answered by Angus H. • Maths tutor
5992 Views

How do you substitute a number into an algebraic expression?

To substitute a number into an algebraic expression, all you need to do is re-write the expression in exactly the same way, except replacing the variable (letter) with the number. It always makes it clearer ...
BH
Answered by Bethany H. • Maths tutor
47959 Views

What is Le Chatelier's principle and how do you apply it to reversible reactions?

Le Chatelier's principle is commonly known as the quilibrium law and it is useful in order to be able to analyse reversible reactions and how changing the conditions will affect which way the reaction will g...
MA
12657 Views

How can I know whether to multiply or add probabilities?

We can only add probabilities when the events are alternatives . For example, let's say we want to calculate the probability that we achieve an A or a B or a C in a given exam. We cannot achieve an A and B f...
NO
Answered by Nathan O. • Maths tutor
85188 Views

Read the below passage; how does Steinbeck present the relationship between George, Lennie and Slim?

Slim sat down on a box across the table from George. He studied the solitaire hand that was upside down to him. ‘Hope you get on my team,’ he said. His voice was very gentle. ‘I gotta pair of punks on my tea...
BM
10699 Views