Calculator question. Whats is the minimum window that allows r^2=4cos(2theta) multiple choice A. [0,2pi

Question

Calculator question.

Whats is the minimum window that allows r^2=4cos(2theta)

multiple choice

A. [0,2pi]

B. [0,pi]

C. [-2pi,2pi]

D [0,pi/2]

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Emery 4 months 2022-01-21T05:06:23+00:00 2 Answers 0 views 0

Answers ( )

    0
    2022-01-21T05:08:05+00:00

    Answer:

    doing this so anicalculus can get brainliest

    Step-by-step explanation:

    0
    2022-01-21T05:08:07+00:00

    Answer:

    D. [0,pi/2]

    Step-by-step explanation:

    when Ф = 0 in radian

    r²=  4cos (2(0))

    r² = 4 * 1

    r² = 4

    ∴ r = √4 = 2

    r = 2.

    when Ф = π/2 in radian

    r²=  4cos (2(π/2))

    r² = 4 * -1

    r² = -4

    ∴ r = 0

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45:7+7-4:2-5:5*4+35:2 =? ( )