The value of sin 20o.sin40o,sin60o.sin80o= 1/16 3/16 1/8 1/4
Satviki Pathak , 9 Years ago
Grade 11
Trigonometry> The value of sin 20 o .sin40 o ,sin60 o ....
1 Answers
Harsh Patodia
Last Activity: 9 Years ago
sin60 = 
/2
sin20sin40sin80
= sin20 sin(60-20)sin(60+20) = ¼ sin3(20) i.e ¼ sin60
(identity sin
sin (60 + ) sin(60 -) = ¼ sin 3)
You can simply from here
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