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Byju's Answer
Standard IX
Mathematics
Calculating Heights and Distances
If a cosθ+b s...
Question
If a cos θ + b sin θ = m and a sin θ − b cos θ = n, then a
2
+ b
2
=
(a) m
2
− n
2
(b) m
2
n
2
(c) n
2
− m
2
(d) m
2
+ n
2