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If cosalpha+cosbeta=1/3and sinalpha+sinb...

If `cosalpha+cosbeta=1/3`and `sinalpha+sinbeta=1/4`,show that `tan ((alpha+beta)/2)=3/4`

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If " "cos alpha+cosbeta=1/3 " and " sinalpha+sin beta=1/4, "show that" " tan"(alpha+beta)/2=3/4

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Knowledge Check

  • If sin 2 alpha + sin 2 beta = 3 "and" cos 2 alpha + cos 2 beta = 4,"then"- tan2 (alpha + beta)=

    A
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    B
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    C
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    D
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