UPSC CDS Math Logarithm Questions

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Question : 1 of 16
 
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What is the value of
log10(cos‌θ)+log10(sin‌θ)+log10(tan‌θ)+log10(cot‌θ)+log10(sec‌θ)+log10(cosec‌θ)
?
[2019 CDS-II]
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