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Free webinar on Robotics (Block Chain) Learn to create a Robotic Device Using Arduino
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Cosec÷cosec-1+Cosec÷Cosec+1= 2sec×secprove that this question Cosec÷cosec-1+Cosec÷Cosec+1= 2sec×secprove that this question
cscA /(cscA - 1 ) + cscA/(cscA + 1) = [cscA(cscA - 1) + cscA(cscA + 1)] / (cscA - 1)(cscA + 1) = cscA(cscA - 1 + cscA + 1) / (cscA - 1)(cscA + 1) = cscA( 2cscA ) / (csc²A - 1 ) = 2csc²A / csc²A - 1 = 2/sin²A / (1/sin²A - 1 ) = 2/sin²A / (1 - sin²A )/sin²A = 2 / (1 - sin²A ) = 2 / cos²A = 2.sec²A
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