JEE Mains Model Paper 1

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Question : 41 of 90

Marks: +1, -0

Let

sin(θ−α)

sin(θ−β)

=

a

b

and

cos(θ−α)

cos(θ−β)

=

c

d

then

ac+bd

ad+bc

=

cos (α - β)
sin (α - β)
sin (α + β)
none of these

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