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Let alphaandbeta be such that piltalp...

Let `alphaandbeta` be such that `piltalpha-betalt3pi`. If `sinalpha+sinbeta=-(21)/(65)and cosalpha+cosbeta=-(27)/(65)`, then the value of `"cos"((alpha-beta))/(2)` is

A

`-(3)/(sqrt(130))`

B

`(3)/(sqrt(130))`

C

`(6)/(65)`

D

`-(6)/(65)`

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The correct Answer is:
A
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-MOCK TEST 2-MCQS
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