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Grade: 10
        

If cot A+ tan A = m sec A – cos A = n , prove that:
(m2n)2/3-(mn2)2/3 = 1.
one year ago

Answers : (1)

Arun
22987 Points
							
Given cot theta +tan theta = m
1/tan theta+ tan theta = m.........(1)
sec theta - cos theta = n
sec theta - 1/ sec theta = n ........(2)

Using equation (1) and (2)
(m^2n)^(2/3)-(mn^2)^(2/3)
((1/tan theta+ tan theta)^2(sec theta - 1/ sec theta))^(2/3)-((1/tan theta+ tan theta)(sec theta - 1/ sec theta)^2)^(2/3)

(1/cos^6 theta)^(1/3)-(sin^6 theta/cos^6 theta)^(1/3)

sec^2 theta-tan^2 theta
=1
one year ago
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