Trigonometry

Asked by raghavendran7 | 13th 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  | 17th May, 2010, 11:51: AM

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