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Evaluate : cos e c(65^0+theta)-sec(25...

Evaluate : `cos e c(65^0+theta)-sec(25^0-theta)-tan(55^0-theta)+cot(35^0+theta)`

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LHS`=cosec(65^circ+theta)-sec (25^circ-theta)-tan (55^circ-theta)+cot (35^circ+theta)`

`=cosec(65^circ+theta)-sec [90^circ-(65^circ+theta)]-tan [90^circ-(35^circ+theta)]+cot (35^circ+theta)`

`=cosec(65^circ+theta)-{cosec}(65^circ+theta)-cot (35^circ+theta)+cot (35^circ+theta)`

`=0`

=RHS
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