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Find the value: 1/(2sin 10^(@))-2 sin ...

Find the value:
`1/(2sin 10^(@))-2 sin 70^(@)`

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The correct Answer is:
1
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Find the value of (1/(2sin10^@)-2sin70^@)

Prove that (1)/(2sin10^(@))-2sin70^(@)=1 .

Knowledge Check

  • 2 sin 40^(@) sin 10^(@)=

    A
    `cos 30^(@) + cos 50^(@)`
    B
    `cos30^(@) - cos50^(@)`
    C
    `cos50^(@)- cos 30^(@)`
    D
    none of these

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