ICSE Class 10 Answered
Prove the following identity
a ) (sinA + cosec A)² + (cosA + secA)² = 5 + sec²A.cosec²A-
2. Find the equation of the perpendicular bisector of the line segment joining A(4,2) and B(-3,-5)
3. Using properties of proportion,find x : y if
a) (x³+12x)/(6x² +8) = (y³+27y)/(9y²+27)
Asked by Sanjeev | 22 Feb, 2018, 05:41: PM
Expert Answer
L.H.S.=Sin²A+cosec²A+2sinA.cosecA+ cos²A+sec²A+2cosA.secA
Sin²A+cos²A+2sinA.1/sinA+2cosA.1/cosA+cosec²A+sec²A
1+2+2+(1/sin²A)+(1/cos²A)
5+(sin²A+cos²A)/(cos²A.sin²A)
5+1/(cos²A.sin²A)
5+sec²A.cosec²A
=R.H.S.
Answered by Sneha shidid | 22 Feb, 2018, 09:06: PM
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