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  1. sin 75° + sin 15° can be expressed as
    1. √3/2
    2. 2/√3
    3. √2/3
    4. √3/2
Correct Option: D

sin 75° + sin 15° = 2 sin

=
75° + 15°
. cos
75° - 15°
22

∵ sinC + sinD
= 2sin
C + D
. cos
C - D
22

= 2 sin 45° . cos 30°
= 2 .
1
.
√3
√22

√3/2


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