In any quadrilateral ABCD,show that cosAcosB-cosCcosD=sinAsinB-sinCsinD
Lovepreet kaur , 7 Years ago
Grade 11
Trigonometry> In any quadrilateral ABCD,show that cosAc...
1 Answers
Saurabh Koranglekar
Last Activity: 5 Years ago
Dear student
On ssimplification of to prove
We get
Cos ( A+ B ) = cos ( C+D)
As quadrilateral is not of specific type we cannot make this equation generalized
Example A and B be 45
And C and D be 135
Regards
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