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Start with the LHS:

(cos^4x - sin^4x) / cos^2x 

Recognise the difference of two squares on the top line, which simplifies to (cos^2x - sin^2x)(cos^2x + sin^2x):

(cos^2x - sin^2x)(cos^...

Parameters are variables sent to procedures so that the procedures are able to use them. There are two main ways of passing parameters, one of which is by value: Passing a parameter by value is where a co...

We can use the following formula: Amount after n years' compound interest = Initial amount x (1 + r)ⁿ r = The interest rate in decimal form. n = Number of years. Simply plug the values into our...

Step 1 define the variables:

L stands for the length, W stands for the width

Step 2 write what we know algebraically: 

Since the length is 5 meters l...

Direct taxes are taxes imposed on people's income or wealth, and on firms' profits.

Indirect taxes are also known as expenditure taxes, and are taxes consumers pay to a seller by buying the good an...