How do i simplify this ? # (tga + tgb)/(ctga + ctgb) #

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Answer 1 · 2018-04-05T12:21:12

Ignore this answer. Please delete @moderators.

Wrong answer. Sorry.

Answer 2 · 2018-04-06T01:08:22

Incorrect Answer

Also the wrong answer, please disregard and delete

Answer 3 · 2018-04-06T02:25:25

#(tana+tanb)/(cota+cotb)=tanatanb#

#(tana+tanb)/(cota+cotb)#

Note that #cotx=1/tanx#, so

#=(tana+tanb)/(1/tana+1/tanb)#.

Find a common denominator for the denominator!

#=(tana+tanb)/((tana+tanb)/(tanatanb))#

Invert and multiply.

#=(tana+tanb)*((tanatanb)/(tana+tanb))#

Cancel.

#=tanatanb#