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If veca+vecb=vecc, and a+b=c then the an...

If `veca+vecb=vecc`, and `a+b=c` then the angle between `veca and vecb` is

A

`90^@`

B

`180^@`

C

`120^@`

D

zero

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The correct Answer is:
D
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CHHAYA PUBLICATION-VECTOR-EXERCISE (Multiple Choice Questions)
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  14. An aeroplane is flying with a velocity of 216 km/h at an altitude of 1...

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  15. The initial velocity and the acceleration of a particle are vecu=3hati...

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  16. The equations of motion of a projectile are x=36 t and 2y=96t-9.8 t^2....

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  17. Two projectiles, projected with angles (45^@- theta) and (45^@+theta)...

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  18. For a projectile, ("horizontal range")^2 =48xx("maximum height")^2 ...

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