sin20° cos 40° + cos 20° sin 40º =
Answers
Answered by
3
Answer:
Explanation:
using the
addition formula for sine
∙
x
sin
(
x
±
y
)
=
sin
x
cos
y
±
cos
x
sin
y
thus the expression on the left side represents
sin
(
20
+
40
)
∘
=
sin
60
∘
=
√
3
2
Answer link
Similar questions