Answers

The Brainliest Answer!
2015-08-14T20:49:09+05:30
TAN15+TAN20*TAN70*TAN75

tan15+tan20*tan(90-20)*tan75

tan15+tan20*cos20*tan75

tan15+tan75

=4
4 5 4
in third step it is cot20 not cos20