A.  ax cosθ+by sinθ=a2 cos4+b2 sin4θ

B.  ax cosθ-by sinθ=a2 cos4-b2 sin4θ

C.  x/acosθ+y/b sinθ=1

D.  x/acosθ-y/b sinθ=1

Correct Answer :
ax cosθ-by sinθ=a2 cos4-b2 sin4θ
Explanation :
No Explanation available for this question
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