inverse trigo

for the principal value of sin^-1(sin5)+cos^-1(cos6)+tan^-1(tan7)=k-2Ï€
find the integral value of k
it is silly b ut its a doubt......

1 Answers

262

Aditya Bhutra ·2012-04-03 00:11:13

first term = 5-2pi
2nd term = 2pi-6
3rd term = 7-2pi

thus k-2pi = (5-6+7) - 2pi

k=6

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