Cos pi/4 - Find Value of Cos pi/4

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Cos pi/4 degrees is the value of cosine trigonometric function for an angle equal to pi/4. Understand methods to find the value of cos pi/4 with examples and FAQs.

Grade 10 Trigonometry] The answer is pi/4 but I didn't understand the process of getting it during class, can anyone please explain? : r/HomeworkHelp

If sin[(andpi;/4)cotandtheta;]=cos[(andpi;/4)tanandtheta;], then andtheta;=a)nandpi;+(andpi;/4)b)nandpi;-(andpi;/4)c)d)Correct answer is option 'A'. Can you explain this answer? - EduRev JEE Question

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