Question

e the information given about the angle o oso< 2t to find the exact valne in (20) cos(20) c) sin d) cos ž e) tan(2o). fltan Ž 1. Sino=15, ococt 11. tan o="13, TCO < 3/2 find the use the half exact value zl. Sin 22.5 angle formulas to of each expression, 29. sin (-/B)

Answer 1

& Auss As I sind- / is in quad-I 020</ 4 C (a) sino Sir 202 2 din o caso = 2x 3 x 4 23 [{mro = my do Cos (20) = 2 los ²0 -1 - 2 4 1 4 ² - - 2016 - 1 25 Cosso - 7 2.5 жы смо» (ө 0 — — 2 8 coso = 1- 2 dies of 4 / 2 = 1 - 2 10) = sin og = 1/60

As we know Cosso a 2 lost so therefore % - 1 Coso = 2 60 2108 of 1 U tau (20) = tan (0+0) taro + fand - tano tauo [ten (120) = 8 As we know tau o = - Cosso senzo therefore fan of u for lo l-loso sino - - 4/5 tan of = 1/2
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