CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In a triangle, the cosines of two angles are inversely proportional to the sides opposite the angles. the
triangle may be

A
isosceles
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
equilateral
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
right angled
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct options are
A isosceles
B right angled
acosA=bcosB2RsinAcosA=2RsinBcosB
sin2A=sin2B
A=B
or 2A+2B=180A+B=90C=90
So the triangle is right angled triangle and it may be an isosceles triangle as well (90-45-45)

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Basic Inverse Trigonometric Functions
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon