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What is \(\cos\left(\frac{\pi}{2}+\theta\right)\) equal to?\(\cos\left(\frac{\pi}{2}+\theta\right)\) किसके बराबर होता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: -\(\sin \theta\)-\(\sin \theta\)
\(\cos\left(\frac{\pi}{2}+\theta\right)=-\sin \theta\). At \(\frac{\pi}{2}\), the function changes and the sign is decided by the quadrant.\(\cos\left(\frac{\pi}{2}+\theta\right)=-\sin \theta\) होता है। \(\frac{\pi}{2}\) पर फलन बदलता है और चिह्न चतुर्थांश से तय होता है।
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