1) 10 + 573 (b) none of these If co...
Question
Fullscreen

1) 10 + 573 (b) none of these If cos20 - cos30 - cos40 + cos50 = a sinsino coso, then 2 is equals to (A) - 2 (B) = 4

JEE/Engineering Exams
Maths
Solution
134
Rating
4.0 (1 ratings)
Fullscreen
( =1 quad 4 cos frac{7 theta}{2} sin theta cdot sin left(-frac{theta}{2}right) ) ( Rightarrow-4 cos frac{7 theta}{2} cdot sin theta cdot sin frac{theta}{2} ) ( therefore lambda=-4 quad ) (3) ( quad ) Plz give rating
Quick and Stepwise Solutions Just click and Send Download App OVER 20 LAKH QUESTIONS ANSWERED Download App for Free