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If Sec (7°-2 a)= Cosec (5a-7), then the value of a is: |
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Answer» HI there !! Sec (7°-2 a)= Cosec (5a-7) sec(90-(7-2a)) = cosec(5a-7) [ sec(90-A)=cosecA ] cosec (90-7+2a ) = cosec (5a-7) 90-7+2a = 5a-7 83+7 = 5a-2a 90 = 3A a= 30°Thankyou :) |
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