Q8) Ifa, b, c (b, care non-parallel) are unit vectors such that ax (b×c) = (1/2) then the angle which a makes with b and are en the angle which a makes with b and c are A. 30, 60 B. 600, 90° C. 90, 60 D. 60°, 30° 0 c00 0 300

Q8) Ifa, b, c (b, care non-parallel) are unit vectors such that a x ( b × c ) = (1/2) then the angle which a makes with b and are en the angle which a makes with b and c are A. 30, 60 B. 600, 90° C. 90, 60 D. 60°, 30°

If two acute angles of a right triangle are equal, then each acute is equal to (a) 30^0 (b) 45^0 (c) 60^0 (d) 90^0

Ifa,b,c are vectors such that a + b + c = 0 and | a | = 7, | b | = 5,| c | = 3, then the angle between c and b is a) pi//3 b) pi//6 c) pi//4 d) pi

The angles of a triangle are in the ratio 1:2:3. The measure of the largest angle is: (a) 30^0 (b) 60^0 (c) 90^0 (d) 120^0

If all the three angles of a triangle are equal, then each one of them is equal to: (a) 90^0 (b) 45^0 (c) 60^0 (d) 30^0

Let a , b and c be three unit vectors out of which vectors b and c are non -parallel. If alpha " and " beta are the angles which vector a makes with vectors b and c respectively and axx (b xx c) = (1)/(2) b, Then |alpha -beta| is equal to

Let a , b and c be three unit vectors out of which vectors b and c are non -parallel. If alpha " and " beta are the angles which vector a makes with vectors b and c respectively and axx (b xx c) = (1)/(2) b, Then |alpha -beta| is equal to