if cos o=2/3 then 2 sec^2o+2tan^2o
-7 is equal to
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You can also directly use pythagoras theorem by taking the base and height from cos० and find perpendicular...And hence u can easily find out the value of the given expression....
But that way is good for mcq questions only...if u r given a particular question to solve, then u must use this way...
Thank You ❤
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