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If x = a sec θ + b tan θ and y = a tan θ b sec θ prove that the value of x2 - y2 will be (1) a2 - b2 (2) a2 + b2 (3) a2 + 1 (4) a2 - 1 |
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Answer» Correct option is (1) a2 - b2 |
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