Question

4 Sin (420-
$\alpha$
) Cos(60+
$\alpha$
)​

Answer 1

Answer:

Answer

4sin(420

∘

−α)cos(60

∘

+α)=2[sin(480

∘

)+sin(360

∘

−2α)]

=2[

2

3

−sin2α]

=

3

−2sin2α

[2sin(A+B)cos(A−B)=sinA+sinB]

Hence, option 'A' is correct.