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15 May, 11:58

What is the value of x?

sin 49° = COS X

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  1. 15 May, 13:14
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    The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!

    Step-by-step explanation:

    here
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