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



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