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Please solve this emideatly please sir please.any one ...vfhf dgdgh dgggd Che fhhf fbh

Please solve this emideatly please sir please.any one ...vfhf dgdgh dgggd Che fhhf fbh

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Grade:12th pass

2 Answers

Arun
25750 Points
5 years ago
Dear student
 
square both the equations and add.
you will get
 
a^2 + b^2 = 3^2 + 4^2 
 
hence a^2 + b^2 = 25
 
Rishu
30 Points
5 years ago
(acos theta + bsin theta)2=42.....(1)
(asin theta + bcos theta)2=32.........(2)
adding (1) & (2)
We get,
a2(sin2theta + cos2theta) + b2(sin2theta +cos2theta)+2sin theta. Cos theta - 2sin theta. Cos theta=42+32 ;
 
 
Answer is 42+32
 
 

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