Question

If Q=180° then find the value of (sinQ + sin20+ sin 30)​

Answer 1

Answer:

sin180°+sin20°+sin30°

solution 1: you can directly provide the values of sin's and calculate like,

sin180° =0

sin30°= 0.34

sin20°= 0.5

sin180°+sin20°+sin30° = 0+0.34+0.5 ~ 0.84(approx)

Step-by-step explanation:

solution 2

Apply formula

SinA+SinB +SinC = 4Sin(A/2)sin(B/2)Cos(C/2)

=> 4sin90sin10cos15

=> 4(1)(0.17)(0.97)

=> ~ 0.87 (approx)