a) Evaluate: cosπ12cos5π12-sinπ12sin5π12{“version”:”1.1″,”ma…
a) Evaluate: cosπ12cos5π12-sinπ12sin5π12{“version”:”1.1″,”math”:”cosπ12cos5π12-sinπ12sin5π12″} b) Prove this identity: cos(90°-x)=sinx{“version”:”1.1″,”math”:”cos(90°-x)=sinx”}
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