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Deepak

· started a discussion

· 1 Months ago

is there any other alternative (Question: 300385.0 )

please provide test bhut mushkil hai itna kaam koi nahi kar payega ...

Question:

If cos (θ –  α   ) = a, cos(θ – β) = b, then sin2( α    – β) + 2ab cos( α    – β) equals to —

Options:
A)

\(\alpha\)2 + \(\beta \)2

B)

\(\beta\)2 – \(\alpha\)2

C)

\(\alpha\)2 – \(\beta\)2

D)

–(\(\alpha\)2 + \(\beta\)2)

Solution:

Ans: (a)

  

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