the numerical value of tan 20 degree tan 80 degree cot 50 degree is equal to
Dear student,
Kindly find the answer to your query:
Now
Hope these points will clear your doubt about the topic and if you have more doubts please get back to us on our forum.
Regards
Kindly find the answer to your query:
Now
tan40.tan80.tan20
=(sin40 sin80)sin20/cos40 cos80(cos20)
=(2sin40 sin80) sin20 / (2cos40 cos80)cos20
=(cos40- cos120) sin20 / (cos120 + cos40) cos20
=(2cos40 + 1)sin20 / (2cos40 - 1) cos20
=2cos40sin20 + sin20 / 2cos40cos20 - cos20
=sin60 - sin20 + sin20 / cos60 + cos20 - cos20
=sin60/cos60
=tan60 = .
Hope these points will clear your doubt about the topic and if you have more doubts please get back to us on our forum.
Regards