If cos 60 is 0.5, what is sin 30?
- 0.5
- 0.866
- None of the above.
Explanation from PART66Online
Sine and cosine of complementary angles are equal, so sin 30 equals cos 60. Since cos 60 is given as 0.5, sin 30 is also 0.5. The value 0.866 is sin 60 (or cos 30), which applies to the complementary angle, not 30 degrees.
I
ianborg asked · 24 Mar 2014
explain pls thx
Community Comments (1)
P
PART66Online
25 Mar 2014
You just need to remember sin cos table for angle values like 0, 30, 45, 90
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