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cos70^(@)+sin40^(@)=...

`cos70^(@)+sin40^(@)=`

A

`sin10^(@)`

B

`cos10^(@)`

C

`tan10^(@)`

D

`cot 10^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • cos 70^(@) + sin 40^(@)=

    A
    `sin 10^(@) `
    B
    `cos 10^(@)`
    C
    `tan 10^(@) `
    D
    `cot 10^(@) `

  • ( sin 70^(@) + cos 40^(@) )/( cos 70^(@) + sin 40^(@))=

    A
    `3`
    B
    `sqrt(3) `
    C
    `1//sqrt(3) `
    D
    `1//2 `

  • (sin 70^(@)+cos40^(@))/(cos 70^(@)+sin 40^(2))=

    A
    3
    B
    `sqrt(3)`
    C
    `1/(sqrt(3))`
    D
    `1//2`

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    Simplify the following : cos100^(@)cos40^(@)+sin100^(@).sin40^(@)

    Simplify cos 100^(@) cos 40^(@) +sin 100^(@) sin 40^(@)

    sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) sin 90^(@)=

    sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)-sin70^(@)-sin80^(@)=

    sin 10^(@) + sin 20^(@) + sin 40^(@) + sin 50^(@) - sin 70^(@) - sin 80^(@) =

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