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Flag Trigonometry> kindly solve question given in attached f...
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kindly solve question given in attached file.. from invers trigonometry function.....

Saurav , 7 Years ago
Grade 11
anser 1 Answers
mahima pareek
Take cos-1(2/sqrt5)= Θ ......(1)
Then your question becomes = tan(Θ/2)
And cosΘ = 2/sqrt5 { from (1) }
And 1- tan2(Θ/2)/1 + tan2(Θ/2) = cosΘ
 By this your answer would be tan(1/2cos-12/sqrt5)=sqrt3/sqrt7
Approve if correct 
Last Activity: 7 Years ago
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