Find the value of tan-1(1) + cos-1(-1/2) + sin-1(-1/2)
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I am in 1st class I don't know thissorry
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Let y = tan - 1 (1)
tan y = 1
tan y =tan (pie /4)
Range of principal value of tan - 1
= (- pie/2, pie /2)
Hence principal value of tan - 1 = pie / 4
Hope it helps u.
Sorry i cant find the symbol of pie in my keyboard, while wrinting exams or notes use the symbol of pie. ok..
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