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Question

If A+B=90, secA=a,cotB=b then " a2b2=0. "if this is right then true and otherwise false ?

A
True
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B
False
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Solution

The correct option is B False
A+B=90
A=90B
secA=a
sec(90B)=a
a=cscB
Given b=cotB
Now a2b2=csc2Bcot2B=10
Hence a2b2=0 is a false statement for the above values of a and b

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