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If ( \theta=\frac{5\pi}{4} ), what is the principal angle of ( -\theta ) between (0) and (2\pi)?यदि ( \theta=\frac{5\pi}{4} ) है तो ( -\theta ) का (0) से (2\pi) के बीच मुख्य कोण क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ( \frac{3\pi}{4} )( \frac{3\pi}{4} )
( -\theta=-\frac{5\pi}{4} ), and ( -\frac{5\pi}{4}+2\pi=\frac{3\pi}{4} ). Add (2\pi) to a negative angle.( -\theta=-\frac{5\pi}{4} ) और ( -\frac{5\pi}{4}+2\pi=\frac{3\pi}{4} ) है। ऋणात्मक कोण में (2\pi) जोड़ें।
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