The value of - a- b -2- a- b 2- a2b2 is

The correct option is D unity { | a× b |^2+ ( a· b )^2}÷ ( a^2b^2 ) =(|a||b|sinθ)^2+(|a||b|cosθ)^2/a^2b^2 =a^2b^2(sin^2θ+cos^2θ)/a^2b^2 = 1 ...

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Transpose of a Matrix

The value of ...

Question

The value of ${{| a \times b |}^{2} + {(a \cdot b)}^{2}} \div (a^{2} b^{2})$ is

unity

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zero

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None of these

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| \to a \times \to b |^{2} .

| \to a \times \to b |^{2} + (\to a \cdot \to b)^{2} = 144

| \to a | = 4

| \to b | =

¯ ¯ ¯ a = 2 \to i + 2 \to j + ¯ ¯ ¯ k, ¯ ¯ b = 5 \to i + ¯ j + 2 ¯ ¯ ¯ k

| ¯ ¯ ¯ a \times ¯ ¯ b |^{2} + (¯ ¯ ¯ a \cdot ¯ ¯ b)^{2} =

(a + b) (a - b) + \frac{1}{2!} (a + b) (a - b) (a^{2} + b^{2}) + \frac{1}{3!} (a + b) (a - b) (a^{4} + a^{2} b^{2} + b^{4}) + . . .

\to a

\to b

| \to a \times \to b |^{2}

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