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Please help me ,how to solve this (2cos40 o - cos20 0 ) / sin20 0 = ?

Please help me ,how to solve this 
(2cos40o - cos200) / sin20= ?

Grade:12th pass

1 Answers

Arun
25763 Points
2 years ago
Dear student
 
2cos40 - cos20 = cos40 + cos40 - cos20 = cos40 - 2sin30sin10 = cos40 - cos80 = 2sin60sin20,
so (2cos40 - cos20)/sin20 = 2sin60 = √3.
Regards
Arun (askIITians forum expert)

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