Math, asked by ry1756269, 11 hours ago

tan70°-tan20°=2 tan 50 prove it

Answers

Answered by padmachinnu2007

2

tan 70°-tan 20°=2tan 50°

according to trigonometry formula

tan(A+B)=(tanA-tanB)/1+tanA×tanB

tan 50°=(tan 70°- tan 20°)/1+tan 70° tan 20°

tan 50°+tan 70° tan 20° tan 50°=tan 70°- tan 20°

tan 50°- tan 20°- tan 20°=tan 50°+ tan 50°

tan 70°- tan 20°=2 tan 50°

HENCE PROVED

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