Question

14. If a cos'a + 3a cos a sin’a = m and a sina + 3a cos’ a sin a = n then (m+n)%> + (m – n)%= = 1). 2a²2) 2a's 3) 20% 4) 2a

JEE/Engineering Exams

Maths

Solution

241

4.0 (1 ratings)

( (m+n)^{2 / 3}+(m-n)^{2 / 3} ) ( left.begin{array}{r}cos ^{3} a+a sin ^{3} alpha+3 a cos alpha times r^{2} alpha +3 a cos ^{2} alpha sin alphaend{array}right]^{2 / 3} ) ( left.int frac{4 a cos ^{3} alpha+3 a cos alpha sin ^{2} alpha}{-a sin ^{3} alpha-39 cos ^{2} alpha sin alpha}right]^{3} ) ( a^{2 / 3}[cos alpha+operatorname{sen} alpha]_{+}^{3 times 4 / 3}{a^{2 / 3}}left[cos alpha-sin ^{2} alpha^{3 times 4} yright. ) a) ( quad a^{4 / 3}left(begin{array}{c}w^{2}