prove that√secO-1/√secO+1+√secO+1/√secO-1=2cosecO
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Step-by-step explanation:
√sec-1/sec+1 + √sec+1/sec-1
=√1-cos/1+cos + √1+cos/1-cos
=√1-cos/√1+cos + √1+cos/√1-cos
=1-cos+1+cos/√sin²
=2/sin
=2cosec
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