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What is the value of cosec (65^circ+ θ) ...

What is the value of `cosec (65^circ+ θ) – sec(25^circ – θ) + tan^(2)20^circ – cosec^(2)70^circ`? `cosec (65^circ+ θ) – sec(25^circ – θ) + tan^(2)20^circ – cosec^(2)70^circ` का मान क्या है?

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PINNACLE-SSC MATHS MAINS 2018 TRIGNOMETRY-Exercise
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