2tan²60°+3scc60°-4sin²30°-2tan45° – InterviewSolution

1.

2tan²60°+3scc60°-4sin²30°-2tan45°

Answer»

tan60 = √3 , tan²60 = 3sec60 = 2 , sec²60 = 4sin30 = 1/2 , sin²30 = 1/4tan45 = 1 , tan²45 = 1

so the value is 2*3+3*4-4*(1/4)-2 = 6+12-1-2 = 15.

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