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p { margin-bottom: 0.25cm; line-height: 120%; } Prove that in a quadrilateral ABCD:- cosA-cosB+cosC-cosD-4sin{(A+B)/2}cos{(A+C)/2}cos{(A+D)/2}=0

p { margin-bottom: 0.25cm; line-height: 120%; }

Prove that in a quadrilateral ABCD:-

cosA-cosB+cosC-cosD-4sin{(A+B)/2}cos{(A+C)/2}cos{(A+D)/2}=0

Grade:11

1 Answers

Vikas TU
14149 Points
2 years ago
Dear student 
Please type the question correctly. 
The question is not clear , 
You can also attach an image. 
Good Luck 
Cheers 
 

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