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Ayush singh

· started a discussion

· 1 Months ago

Math (Question:108045.0)

Math mock 2 ques no 92

Question:
Find the value of cos20° cos40° cos60° cos80°.
Options:
A) \(\cfrac{1}{16}\)
B) \(\cfrac{3}{16}\)
C) 1
D) 0
Solution:
Ans: (a)

cos20° cos40° cos60° cos80° = cos20° cos40° cos80°.cos60°

\(\cfrac{1}{2}\) (2cos 20o  cos 40o). cos80o . cos60o


Knowledge Expert

· commented

· 1 Months ago

Dear student
Please mention your doubt below that
particular ambiguous question.

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