Grade 11Trigonometry
simply :(i) cos2a - cos2b / cosa – cosb . (ii) cosx/1+cosx
simply :(i) cos2a - cos2b / cosa – cosb .
(ii) cosx/1+cosx
1 Answer
Saurabh Koranglekar
Dear student
1)
Cos 2a = 2 cos^2 a -1
cos 2b = 2 cos ^2 b - 1
Simplify given condition
2 ( cos a + cos b)(cos a- cos b)/( cos a -cos b)
= 2 ( cos a + cos b)
Regards
1)
Cos 2a = 2 cos^2 a -1
cos 2b = 2 cos ^2 b - 1
Simplify given condition
2 ( cos a + cos b)(cos a- cos b)/( cos a -cos b)
= 2 ( cos a + cos b)
Regards
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