121.
(1 + tan 95°) (1 + tan 130°) =
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Answer:
95+130=225
Tan225°=Tan(95+130)
Tan(180+45)=(Tan95+Tan130)/(1-Tan95 tan130)
Tan45=(Tan95+Tan130) /(1-Tan95 Tan130)
1 =(Tan95+Tan130) /(1-Tan95Tan130)
1-tan95 tan130=tan95 +tan130
1=tan95+tan130+tan95 tan130
Add 1 both sides
2=1+tan95+tan130+tan95 tan130
2=1(1+tan95)+tan 130((1+tan95)
2=(1+tan95)(1+tan130)
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