Asked by mystery
how can we find sin,cos,tan values like sin480, tan270?
Answers
Answered by
Steve
reduce them by 360 until the values are between 0 and 360. So,
sin 480° = sin(480-360) = sin 120°
Now, you have to consider which quadrant you are in.
sin 120° = sin(180-120) = sin 60° = √3/2
sin 270° = sin(-90°) = -sin(90°) = -1
Now review this section in your text, and see how it all fits together.
sin 480° = sin(480-360) = sin 120°
Now, you have to consider which quadrant you are in.
sin 120° = sin(180-120) = sin 60° = √3/2
sin 270° = sin(-90°) = -sin(90°) = -1
Now review this section in your text, and see how it all fits together.
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