- In triangle ABC,^ is equal to:
(a)
( )
(b)( )
(c)( )(d)
( )- In a triangle ABC,
(b+c) cos A+ (c+a) cos B+ (a+b) cos C
is:
(a) 0 (b) 1 (c) a+b+c (d) 2(a+b+c) - In a triangle ABC, if^ =^
, then the triangle is:^
(a) right angled (b) obtuse angled (c)
equilateral
(d) isosceles
- In a triangle ABC, if a= 2x, b= 2y,
and C= 120, then the area of the
triangle is:
(a) xy (b) xy √ (c) 3 xy (d) 2 xy - In a triangle ABC, cosec A (sin B
cosC + cosB sinC) is equal to:
(a) c/a (b) a/c (c) 1 (d) c/ab - In triangle ABC, if tan^ tan^ =^ ,
then a, b, c are in:
(a) AP (b) GP (c) HP (d) none of these
- If triangle ABC, (b-c) sin A+(c-a) sin
B+ (a-b) sin C is:
(a) ab + bc + ca (b) (c) 0
(d) none of these - If in an equilateral triangle R=
√ cm, then the length of each side of
the triangle is:
(a) 1cm (b) 2cm (c) 3cm (d) none of
these
- In triangle ABC, cos A= , then
the triangle is:
(a) equilateral (b) isosceles (c) right
angled (d) none of these - In triangle ABC, if 8
, then the triangle is:
(a) right angled (b) equilateral (c)
acute angled
(d) obtuse angled - If a sides of a triangle be ( +x+1),
(2x+1) and ( - 1), then the greatest
angle is:
(a) 105 (b) 120 (c) 135 (d) none of
these - ABC is a triangle which is not
isosceles, BC cos A= AB, cos C, then:
(a) (b)
(c) Area of triangle ABC= √^ (AB)
(BC) (d) = - The three angles A, B, and C of a
triangle ABC are in AP and
. If c= 50m, then what is the area of
the triangle (in sq. metres)?
(a)^ (b)^ √^ (c)^ √^ (d) 625 - In a triangle ABC, , then
what is the value of tan A+tan C?
(a) tan B (b) tan A. tan C (c) (d)^ - ABCD is a rhombus and K is the
middle point of the side AB, CK is
perpendicular to AB. What is the value
of angle A?
(a) 120 (b) 105 (c) 90 (d) 60