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If sintheta+sinphi=2,then what is the va...

If `sintheta+sinphi=2`,then what is the value of `cos(theta+phi)?`

A

a)0

B

b)1

C

c)-1

D

d)2

Text Solution

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Knowledge Check

  • If sin^2theta=sinphi cosphi then the value of cos2theta is

    A
    `cos^2(pi/4+phi)`
    B
    `2cos^2(pi/4+phi)`
    C
    `3cos^2(pi/4+phi)`
    D
    `4cos^2(pi/4+phi)`

  • If sintheta costheta=1/2 what is the value of (sintheta-costheta)^2 ?

    A
    0
    B
    1
    C
    2
    D
    None of the above

  • If (1+ tan theta) (1+ tan phi)=2, then the value of (theta+ phi) is

    A
    `30^(@)`
    B
    `45^(@)`
    C
    `75^(@)`
    D
    `60^(@)`

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