Learn to Create a Robotic Device Using Arduino in the Free Webinar. Register Now
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Free webinar on Robotics (Block Chain) Learn to create a Robotic Device Using Arduino
30th Jan @ 5:00PM for Grade 1 to 10
In a triangle ABC, if the angle c is obtuse, then tanAtanB= 1)>1 2) 3)=1 4)=0 In a triangle ABC, if the angle c is obtuse, then tanAtanB=1)>12)3)=14)=0
Dear Sunny In case that C is obtuse, Then C>90.So A+B msut be less than 90... (because in a triangle A+B+C=180, and C is above 90)So tan(A+B) must be postivie... (Since A+B is acute tan(A+B) = (tanA+tanB)/(1-tanAtanB)So 1-tanAtanB>0..... (Only then tan(A+B) can be positive)Hence tanAtanB Hope it helps RegardsArun (askIITians forum expert)
In case that C is obtuse,
Then C>90.
So A+B msut be less than 90... (because in a triangle A+B+C=180, and C is above 90)
So tan(A+B) must be postivie... (Since A+B is acute
tan(A+B) = (tanA+tanB)/(1-tanAtanB)
So 1-tanAtanB>0..... (Only then tan(A+B) can be positive)
Hence tanAtanB
Hope it helps
Regards
Arun (askIITians forum expert)
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -