Question

यदि cos20 = sin 40 हो और 20 व 40 न्यूनकोण हो तो 0 का मान ज्ञात कीजिए।​

Answer 1

Answer:

40 = 90 - 50

cos 20 = sin (90 - 50)

cos 20 = cos 50

20 = 50

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