please answer it with little explanation
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value of sec inverse thita lies between 0 to π
like 0 less than or equal to sec inverse less than or equal to π
so value of each term in the l.h.s of the given equation will be π
now ,
sec inverse x=π
x=secπ
x=-1
similarly
y=-1& z=-1
so value of xy+yz+zx=1+1+1
=3
like 0 less than or equal to sec inverse less than or equal to π
so value of each term in the l.h.s of the given equation will be π
now ,
sec inverse x=π
x=secπ
x=-1
similarly
y=-1& z=-1
so value of xy+yz+zx=1+1+1
=3
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