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Oct 18, 2015 ... My question is this, using the identity: e^(ix)=cos(x)+jsin(x) show that tan(2x)=−i(e^(4ix)−1)/(e^(4ix)+1) Solution ... So, tan2x = 12/5 when tanx = -3/2 and x terminates in quadrant IV. Like. 0. Ask a new question. Discover more ... Apr 18, 2021 ... View full question and answer details: ... The Feizy Marabel Traditional Oriental, Red/Blue/Tan, 2' x 3' Accent Rug is available online for delivery, call or chat to check for local availability in our ... 2sec 2 x – tan 2 x = 5 ⇒ 2tan 2 x + 2 – tan 2 x = 5 ⇒ tan 2 x = 3 ⇒ tanx = √3 Given, 0° ≤ x ≤ 90°, ⇒ tan (2x) = 2 tan (x) / (1 - tan2 (x)). Problem # 5: Evaluate: 5 sin (2x) ... tan2 (x / 2) = (1 - cos (x)) / ((1 + cos (x)). Problem # 6: Find the sin (135) ... Þ ¼ 1 þ tan 2 x tan π. 4. ¼ 1. The first derivative of a function is defined as follows: lim x⟶x0. f xð Þ - f x0 ð Þ x - x0. Therefore, the value of the ... Nov 19, 2019 ... sin(2x) = 2 sin(x) cos(x) = 2 (-8/17)(15/16) = -240/289 cos(2x) = 1 - 2* sin^2(x) = 1 - Jul 25, 2020 ... tan #tan2x #trigonometry #doubleangleformula. y = arctan(tan2x)). Natural Language; Math Input. Have a question about using Wolfram|Alpha?Contact Pro Premium Expert Support » · Give us your feedback »