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Questions and answers by
hari krishna
Answers (1)
Tan 75 = tan (45 +30) = tan 45 + tan 30/1-tan 45 *tan 30 = (1+ 1/√3)/(1-1/√3) = √3 + 1/√3-1 = √3 + 1/√3-1 (afterationalization ) = 2+√3 cos 15 = cos (45 - 30) = cos 45 cos 30+ sin 45 sin 30 =
