Which of the following is a trigonometric identity? cot 0 + tan 0 = 1 sec2 0 +csc2 0 = 1 tan2 0 = sin2 0 x sec2 0 co

Question

Which of the following is a trigonometric identity?
cot 0 + tan 0 = 1
sec2 0 +csc2 0 = 1
tan2 0 = sin2 0 x sec2 0
cos2 = sec2 0 x tank 0​

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Kiệt Gia 3 years 2021-08-27T00:59:12+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-27T01:00:30+00:00

    Answer:

    third one

    I’m assuming does 2’s are squared symbols.

    Step-by-step explanation:

    It’s the third one because

    sin^2 x sec^2 x

    sin^2 x (1/cos^2 x) by reciprocal identity

    sin^2 x/cos^2 x by multiplicative identity prop

    tan^2 x by quotient identity

    The first one wouldn’t work because plugging in pi/4 gives 1+1=1 which isn’t true.

    The second one doesn’t work because plugging in pi/4 gives 2+2=1 which isn’t true.

    The last equation doesn’t make sense at all. There is no variable on the left and on the right there is an extra variable.

    0
    2021-08-27T01:00:47+00:00

    Answer:

    it’s the first one… I think

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )