Question

evolute tan 35 degree upon cot 55 degree + cos 78 degree upon sin 12
degree minus 1

Answer 1

Solution :

( tan 35°/cot 55° ) + ( cos 78°/sin 12°)-1

= [tan(90-55)/cot55 ]+[cos(90-12)/sin12]-1

= [ cot55/cot55 ] + [ sin 12 / sin 12 ]-1

= 1 + 1 -1

= 2 - 1

= 1

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