NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...

## Properties of Triangle

### Mathematics

#### Previous Years Questions

More
The angles of a triangle are in the ratio 2 : 3 : 7 and the radius of the circumscribed circle is 10 cm. The length of t...
WB JEE 2019
The three sides of a right angled triangle are in GP (geometric progression). If the two acute angles be $$\alpha$$ and ...
WB JEE 2019
If in a triangle ABC, sin A, sin B, sin C are in A.P., then
WB JEE 2011
In a $$\Delta$$ABC, $$2ac\sin \left( {{{A - B + C} \over 2}} \right)$$ is equal to
WB JEE 2010
If $${{\cos A} \over 3} = {{\cos B} \over 4} = {1 \over 5}, - {\pi \over 2} ... WB JEE 2010 In a right-angled triangle, the sides are a, b and c, with c as hypotenuse, and c$$-$$b$$\ne$$1, c + b$$\ne$$1. Th... WB JEE 2010 In a triangle PQR,$$\angle$$R =$$\pi$$/2. If$$\tan \left( {{P \over 2}} \right)$$and$$\tan \left( {{Q \over 2}} \ri...
WB JEE 2010
In triangle ABC, if $$\sin A\sin B = {{ab} \over {{c^2}}}$$, then the triangle is
WB JEE 2009
If a = 2$$\sqrt2$$, b = 6, A = 45$$^\circ$$, then
WB JEE 2009

## Subjective

More
If cos A + cos B + cos C = 0, prove that cos 3A + cos 3B + cos 3C = 12 cos A cos B cos C.
WB JEE 2011

### Joint Entrance Examination

JEE Main JEE Advanced WB JEE

### Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

NEET

Class 12