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

Question

2 years ago

14

sinx = cos3 x

2 answers:

dangina [55] · Answer 1 · 2022-06-25T11:28:36+03:00

4 0

The answer is 0 because 180 degrees does not make a valid statement

Mashutka [201] · Answer 2 · 2022-06-25T13:42:22+03:00

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.