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17 January, 00:38

If the sin 90 = 1, then the cos 0 =

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Answers (2)
  1. 17 January, 01:02
    0
    Rule of trigonometric functions:-

    sin a = cos (90 - a)

    Here a = 90°.

    sin 90 = cos (90 - 90)

    1 = cos 0.

    cos 0 = 1.

    So the cos 0 = 1.
  2. 17 January, 01:07
    0
    Step-by-step explanation:

    If sin 90 = 1

    then cos 0 will be

    as we know that

    cosx = sin (90-x)

    If we plug x = 0,

    cos0 = sin 90 = 1
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