MARKING BRAINLIEST!! Use a reference angle to find the exact value of the sine, cosine, and tangent of each angle. -pi. (unit circle) –

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MARKING BRAINLIEST!! Use a reference angle to find the exact value of the sine, cosine, and tangent of each angle. -pi. (unit circle) -pi= -180 degrees btw.

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Hưng Khoa 5 years 2021-07-26T15:40:00+00:00 1 Answers 25 views 0

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  1. Nem
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    2021-07-26T15:41:58+00:00
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    Answer:

    The answer is below

    Step-by-step explanation:

    The question is not complete, a complete question is in the form:

    Use a reference angle to find the exact value of the sine, cosine, and tangent of each angle. 260°

    Solution:

    There are four quadrants which divides into four equal parts. If θ is the angle:

    If θ falls in the first quadrant, the reference angle = θ

    If θ falls in the second quadrant, the reference angle = 180 – θ

    If θ falls in the third quadrant, the reference angle = θ – 180

    If θ falls in the fourth quadrant, the reference angle = 360 – θ

    Given 260°, this falls in the third quadrant, hence the reference angle = 260 – 180 = 80°.

    In the third quadrant, sine and cosine are negative while tangent is positive. Hence:

    sin(260) = -sin(80) = -0.985

    cos(260) = -cos(80) = -0.174

    tan(260) = tan(80) = 5.67

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