CBSE Class 11-science Answered
Trigonometry
Asked by raghavendran7 | 13 May, 2010, 07:51: PM
Expert Answer
We can use trignometric identities,
such as sin2x = 2sinxcosx
sin (180) = 2sin90cos90, but since cos 90 is zero,
sin(180) = 0,
cos(180) = cos90cos90 - sin90sin90 = -1,
tan 180 = sin180/cos180 = 0/-1 = 0.
Regards,
Team,
TopperLearning.
Answered by | 17 May, 2010, 11:51: AM
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