sin 20°.cos 40°+cos 20° .sin 40°=?
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Answered by
2
Answer:
✓3/2
Step-by-step explanation:
sin(a+b) = sin a cos b + cos a sin b
We have a=20° b=40°
sin 20° cos 40° + cos 20° sin 40°
= sin(20°+40°)
= sin(60°)
= √3/2
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Answered by
0
Answer:root 3 /2
Step-by-step explanation:
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