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Some Applications Of Trigonometry

Question
CBSEENMA10008054

Evaluate:
fraction numerator cos space 70 degree over denominator sin space 20 degree end fraction plus fraction numerator cos space 55 degree. space cosec space 35 degree over denominator tan space 65 degree. space tan space 25 degree end fraction minus tan space 45 degree. space tan space 5 degree. space tan space 85 degree.




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