Question

79. Two vectors ā and b are at an angle of 60° with each other.
Their resultant makes an angle of 45° with a If|b1 =2 unit,
then lã is

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Answer 1

Answer:

theta = 60° , b = 2 , a= ?

resultant make an angel ( alpha) = 45°

tan (alpha) = b sin theta / a + b cos theta

b sin theta = a+b cos theta

= 2 { √3/2 } = a + 2 [1/2]

a = √3-1

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