यदि A=45° तब sin45°+cos45°=

Er Chandra Bhushan
0


 यदि alpha = beta = 60° हो, तो:

alpha - beta = 60° - 60° = 0°

अब, cos(0°) की गणना करें:

cos(0°) = 1

अतः, cos(alpha-beta) का मान 1 है।

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