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sec0-1sec θ + 1sine 2[1+cos θ0. |
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Answer» (sec∅-1)/(sec∅+1)= (1/cos∅-1)/(1/cos∅+1)= 1-cos∅/1+cos∅= (1-cos∅)(1+cos∅)/(1+cos∅)(1+cos∅)= (1-cos²∅)/(1+cos∅)²= (sin∅)²/(1+cos∅)² |
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