WILL MARK BRAINLIEST! If cos u = 4/5 and tan v = – 12/5 while (3pi)/2 < u < 2pi and pi/2 < v < pi find:

Question

WILL MARK BRAINLIEST!

If cos u = 4/5 and tan v = – 12/5 while (3pi)/2 < u < 2pi and pi/2 < v < pi find:

cos2u

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Maris 5 years 2021-08-18T04:16:57+00:00 1 Answers 15 views 0

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  1. Dulcie
    0
    2021-08-18T04:18:42+00:00
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    Answer:

    Cos 2u = 7/25

    Step-by-step explanation:

    Here, we want to find the value of cos2u

    Using formula, we can rewrite cos 2

    Mathematically;

    cos 2u = 2cos^2 U – 1

    Thus, we have that

    cos 2u = 2(4/5)^2 – 1

    cos 2u = 2(16/25) – 1

    cos 2u = 32/25 – 1

    cos 2u = (32-25)/25 = 7/25

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