engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
\(\frac{{sin\ {{27}^0}cos\ {{63}^0}}}{{co{s^2}\ {{27}^0}}} - \frac{{sec\ {{27}^0}cosec\ {{63}^0}}}{{ta{n^2}\ {{45}^0}}}\) का मान क्या है?
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