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What is (\cos(\frac{\pi}{2}+x)) equal to?(\cos(\frac{\pi}{2}+x)) किसके बराबर है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (-\sin x)(-\sin x)
In the form (\frac{\pi}{2}+x), (\cos) changes to (\sin) with a negative sign. Hence it becomes (-\sin x).(\frac{\pi}{2}+x) वाले रूप में (\cos) बदलकर (\sin) होता है और चिन्ह ऋणात्मक होता है। इसलिए (-\sin x) मिलता है।
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