Question

What conclusion can you draw about vector b if vector a + vector b =vector a - vector b​

Answer 1

┏_________∞◆∞_________┓

✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭

┗_________∞◆∞_________┛

Given that,

A + B = A - B

We know that,

A + B = √(A² + B² + 2ABcosФ)

A - B = √(A² + B² - 2ABcosФ)

Hence,

√(A² + B² + 2ABcosФ) = √(A² + B² - 2ABcosФ)

A² + B² + 2ABcosФ = A² + B² - 2ABcosФ

4ABcosФ = 0

cosФ = 0

Ф = 90°