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Evaluate : (cos^2(45 + theta) + cos^2(4...

Evaluate : ` (cos^2(45 + theta) + cos^2(45 - theta))/(tan(60^@ + theta) tan(30^@ - theta)) + cosec(75^@ + theta) - sec(15^@ - theta)`

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`(cos^2(45+theta)+sin^2(90-(45-theta)))/(tan(60+theta)cot(90-(30-theta)))+cosec(75+theta)-cosec(90-(75+theta)`
`(cos^2(45+theta)+sin^2(45+theta))/(tan(60+theta)cot(60+theta))+cosec(75+theta)-cosec(75+theta)`
`1/1+0=1`.
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