Answers

2016-06-06T15:15:02+08:00
Sin2a= 2sina cosa

cos2a= cos^2a-sin^2a
             1-2sin^2a
              2cos^2a-1

tan2a= 2tan(a)/1-tan^2(a)

ps. Mali po ata hehe. :)
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Di po tama nga po eh salamat
whieee. Welcome po :)
  • Brainly User
2016-06-10T09:38:56+08:00
1)  sin2A = 2sinA cosA

2) cos2A = cos²A-sin²A

3) tan2A =  \frac{2tanA}{1-tan ^{2}A }
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