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The option (a) is correct
(b) is incorrect because it is shown dot- product. and we use cos© in dot- product. and cos 90° is zero. so it should be 0.
(c) is incorrect because cos 0° is 1. thus it should be 1.
(d) is incorrect because it is uncertain. j + j can be anything.
Finally, ( a) is correct because j x k is cross product and we use sin© in it. and sin 90 = 1. and since it is clock wise it is equal to i.
(b) is incorrect because it is shown dot- product. and we use cos© in dot- product. and cos 90° is zero. so it should be 0.
(c) is incorrect because cos 0° is 1. thus it should be 1.
(d) is incorrect because it is uncertain. j + j can be anything.
Finally, ( a) is correct because j x k is cross product and we use sin© in it. and sin 90 = 1. and since it is clock wise it is equal to i.
arpita2280:
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Answered by
1
The option (a) is correct
(b) is incorrect because it is shown dot- product. and we use cos© in dot- product. and cos 90° is zero. so it should be 0.
(c) is incorrect because cos 0° is 1. thus it should be 1.
(d) is incorrect because it is uncertain. j + j can be anything.
Finally, ( a) is correct because j x k is cross product and we use sin© in it. and sin 90 = 1. and since it is clock wise it is equal to i.
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