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Some Applications Of Trigonometry

Question

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Evaluate:
$fraction numerator sec squared left parenthesis 90 degree minus straight theta right parenthesis minus cot squared straight theta over denominator 2 left parenthesis sin squared space 25 degree space plus space sin squared space 65 degree right parenthesis end fraction plus fraction numerator 2 cos squared space 60 degree. space tan squared space 28 degree. space tan to the power of 2 space end exponent 62 degree over denominator 3 space left parenthesis sec squared space 43 degree space minus space cot squared space 47 degree right parenthesis end fraction$

Solution

Solution not provided.
Ans. $2 over 3$

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