plz solve 151 question
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Multiply and divide with sin20, then sin40, and then sin80
the formulas used are sin(160) = sin(180-20) = sin20
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here is your answer...... option B 1/8
plz mark brainliest
plz mark brainliest
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→ cos20cos40cos80
Multiply and divide with 8sin20
→ 8sin20cos20cos40cos80/8sin20
→ 4sin40cos40cos80/8sin20 (∵ 2sinAcosA = sin2A)
→ 2sin80cos80/8sin20
→ sin160/8sin20 (∵sin(160) = sin(180-20) = sin20)
→ sin20/8sin20
→ 1/8
Hope it helps!!
: )
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