Question

30. (1) By Trigonometric identies ( 1-sin ^{2} theta=cos theta ) and ( 1-cos ^{2} theta=sin theta )
[
sqrt{frac{left(1-sin ^{2} thetaright)}{left(1-cos ^{2} thetaright)}}=sqrt{frac{cos ^{2} theta}{sin ^{2} theta}}=frac{cos theta}{sin theta}
]
By reciprocal relation of Trigonometric ratios
[
cot theta=frac{cos theta}{sin theta}
]

# 30. simplify VI -sin) + (1 - cose) RRB NTPC (Phase I) 2016 (1) cote (2) tano (4) coseco (3) seco

Solution