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If a and b are two units vectors inclined at an angle of $60 °$ to each other, then

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|a+b|>1

|a+b|<1

|a-b|>1

|a-b|<1

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detailed solution

Correct option is A

|a+b|=2Acosθ2=(2)(1)cos30°=3|a-b|=2Acosθ2=(2)(1)cos30°=1

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If a and b are two units vectors inclined at an angle of 60° to each other, then

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If a and b are two units vectors inclined at an angle of $60 °$ to each other, then