1.

I : If (cos alpha )/(a)=(sin alpha )/(b) then a cos2 alpha + b cos 2 alpha =a II : If(sin alpha )/(a) =(cos alpha )/(b)thena sin 2 alpha + b cos 2 alpha = a

Answer»

Only I is TRUE
Only II is true
Both I and II are true
NEITHER I nor II are true

ANSWER :A


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