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किक लक न e SRo 3/% et uL\' g P,\we*ksd Sec o +ToiBD |
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Answer» SecФ = x + 1/(4x) sec²Ф = x² + 1/(16 x²) + 1/2Tan²Ф = x² + 1/(16 x²) - 1/2 as sec² - tan² = 1 = (x - 1/(4x) )²tanФ = + (x - 1/(4x)) or - (x - 1/(4x) ) secФ + tanФ = 2x or 1/(4x) + 1/(4x) = 1/(2x) |
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