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Class 10 Mathematics Medium Mcq English Medium

Which identity is correct for an acute angle q?

Question
Which identity is correct for an acute angle q?
sin²q - cos²q = 1
sinq + cosq = 1
tan²q + sin²q = 1
sin²q + cos²q = 1
Answer
sin²q + cos²q = 1
Detailed Explanation
The fundamental Pythagorean identity is sin²q + cos²q = 1. — Examisthan.com
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