Razones trigonometricas SECUNDARIA 4ºESO trigonometria seno coseno matematicas

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If this video helped you and want to unicoos keeps growing, SUBSCRIBE, Click like and SHARE IT. If also you join us in http://www.unicoos.com will be cool!#nosvemosenclase • From the sine and cosine of two different angles, we will get the value of the rest of its TRIGONOMETRIC REASONS and some identities related to, like sine(a+b), cosine(a+b), sine of the half angle sen(a/2), sine of the double angle sine(2a), sine of the complementary angle sine(90-a) and tangent of the suplementary angle tan(180-a). • For that we need to know these identities, how to REDUCE TO THE FIRST QUADRANT and the general equation of trigonometry cos²a+sin²a=1. • ERROR FILE: to see what it must to be done ;-) • Minute 13:16 I said 2√2/3 and I wrote 2√3/3... • The answer is (-√15-2√2)/12 • Minute 19:12 Should have writtent something else like cos a and cos b. The correct answer would be... • √((1-√15/4)/2)=√(((4-√15)/4)/2)=√((4-√15)/8).. send nudes • Follow us in: • YOUTUBE / unicoos • FACEBOOK / unicoos (Me gusta) • TWITTER / unicoos (@unicoos) • GOOGLE + http://www.google.com/+unicoos • WEB http://www.unicoos.com • and if you want to help me to subtitle the videos in another languages, I would be infinitely grateful.... http://www.amara.org/es/profiles/vide...

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