Question

find sin pi by 10 cos pi by 10 tan pi by 10​

Answer 1

Answer:

(3-√10)/8

Step-by-step explanation:

Sin(π/10)×cos(π/10)×tan(π/10) = sin(π/10)×cos(π/10)×sin(π/10)/cos(π/10)

which equals to

sin²(π/10) = sin²18 = (√5-1)²/4²= 6-2√10/16 = 3-√10/8