so tan(a) = 5/2 and tan b = 1/2 (2 angles on a triangle)

I want to add both angles - the sum formula for tangents is (a+b)/(1-a*b)

the issue is this is equal to -12

what am I missing here?

YourAverageDummy Feb 3, 2023

#1**+1 **

(a + b) / (1 - a*b)

(5/2 + 1/2) / (1 - (5/2*1/2))

(2.5 + 1/2) / (1 - (1.25))

**( 3 ) / ( - 0.25) == - 12**

Guest Feb 3, 2023

#2**+1 **

ok so the correct answer was -12 and I was overthinking it thank you!

YourAverageDummy
Feb 3, 2023