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Pls help me in this specific question I am not getting this question

Pls help me in this specific question I am not getting this question

Question Image
Grade:11

1 Answers

Vikas TU
14149 Points
4 years ago
Dear Student,
We are given ques = 2sin(A/2)
Lets see option A: sqrt(1+sinA)+sqrt(1-sinA)=sqrt(1+2sin A/2 cos A/2)
+ sqrt(1-2sin A/2 cos A/2)=sqrt(sin^2 A/2 +cos^2 A/2 +2sin A/2 cos A/2)+ sqrt(sin^2 A/2 +cos^2 A/2 -2sin A/2 cos A/2)=sin A/2+cos A/2 +sinA/2 -cos A/2=2 sin A/2 – so option A is correct.
Cheers!!
Regards,
Vikas (B. Tech. 4th year
Thapar University)

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