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The value of tan 15^@ tan 25^@ tan 45^@ ...

The value of tan `15^@ tan 25^@ tan 45^@ tan 65^@ tan 75^@` is

A

1

B

2

C

3

D

4

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The value of tan 15^(@) tan20^(@) tan 70^(@) tan75 is

    A
    -1
    B
    2
    C
    0
    D
    1

  • The value of tan 7^(@) tan 23^(@) tan39^(@) tan 60^(@) tan 51^(@) tan 67^(@) tan 83^(@) is

    A
    0
    B
    1
    C
    `sqrt(3)`
    D
    `(1)/(sqrt(3))`

  • If tan 10^(@) = 2 - sqrt(3) , then the value of tan 15^(@) cot 75^(@) + tan 75^(@) cot 15^(@) is

    A
    14
    B
    12
    C
    10
    D
    8

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    Evaluate : (3 cos 55^(@))/(7 sin 35^(@)) - (4 cos 70^(@) cosec 20^(@))/(7 (tan 5^(@) tan 25^(@) tan 45^(@) tan 65^(@) tan 85^(@))) .

    The value of tan10^(@)tan15^(@)tan75^(@)tan80^(@) is

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