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Artemon [7]
3 years ago
14

Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal. cos x - cos x

sinx = cos3 x
Mathematics
2 answers:
dangina [55]3 years ago
4 0
The answer is 0 because 180 degrees does not make a valid statement
Mashutka [201]3 years ago
3 0

Answer:

The answer is pi/4

Step-by-step explanation:

You substitute each x for "pi/4", you will see that the equation is incorrect, the two values are no longer equal.

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