Answer:
sin A = opp/hyp = 15/17
Right triangle
Therefor
a² + b² = c²
adj² + opp² = hyp²
adj² + 15² = 17²
adj² = 17² - 15²
adj² = 289 - 225
adj² = 64
adj = 8
Cos = adj/hyp
cos A = 8/17 <–––––
Step-by-step explanation:
Answer:
-19561285.5554
Step-by-step explanation:
Step-by-step explanation:
1/(1 - p + p²) - 1/(1 + p + p²) - 2p/(1 - p² + p⁴) =
[ (1 + p + p²)-(1 - p + p²)/(1 - p + p²)(1 + p + p²) ] - 2p/(1 - p² + p⁴) =
2p/(1 + p + p² - p - p² - p³ + p² + p³ + p⁴) - 2p/(1 - p² + p⁴) =
2p/(1 + p² + p⁴) - 2p/(1 - p² + p⁴) =
[ 2p(1 - p² + p⁴) - 2p( 1 + p² + p⁴) ]/(1 + p² + p⁴)(1 - p² + p⁴) =
(2p - 2p³ + 2p⁵ - 2p - 2p³- 2p⁵) / (1 - p² + p⁴ + p² - p⁴ + p⁶ + p⁴ - p⁶ + p⁸) =
-4p³ / (1 + p⁴ + p⁸)
