Math, asked by tanisha291, 1 year ago

without ising the trigonometric tables evaluate

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Answered by sumeet2555owxrxm

cos(20) = cos(90-70) = sin(70)
cosec(37) = cosec(90-53) = sec(53) = 1/cos(53)
tan(75) = tan(90-15) = cot(15)
tan(55) = tan(90-35) = cot(35)

so answer is 11/7 - 4/7 = 1

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