Sin cos tan

If cos y = 0.8, 0° ≤ y ≤ 90°, find the value of (4 tan ⁡y) / (cos⁡ y-sin ⁡y)

Correct answer:

a =  15

Step-by-step explanation:

c=cosy c=0.8  sin2 y+cos2 y=1 s2+c2=1  s=1c2=10.82=53=0.6  tanα=sinα:cosα  t=cs=c53=0.80.6=43=0.75  a=cs4 t=c534 43=0.80.64 0.75=15

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.
See also our right triangle calculator.
See also our trigonometric triangle calculator.

We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: