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3 years ago

14

Which of these equations is always true?

1 answer:

NISA [10]3 years ago

6 0

Answer:
sin(x)=cos(90*-x)
Explanation:
Looking at the graphs of sin(x) and cos(x), you can see that the peaks of the graph are separated by a value of pi/2. If you convert that value into degrees, then the two graphs are separated by 90*. Another way of thinking is from the unit circle. sin(x) = 1 at 90*, and cos(x)=1 at 0*. The difference is still 90*.

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Answer:

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