Question

The value of sin 50° – sin 70° + sin 10° is equal to

Answer 1

Answer:

Hola‼........❤✌

Given, sin 50° - sin 70°+ sin 10°

 = sin(60° - 10°) - sin(60°+10°) + sin 10°

Formula is :Sin(a-b) = sin a cos b- cos a sinb, Sin(a+b) = sin a cos b + cos a sinb

= Sin(60) Cos(10) - Cos(60)Sin(10) - (Sin(60)Cos(10) + Cos(60)Sin(10)) + Sin(10)=  -2*Cos(60) Sin(10) + Sin(10) =  -2*(1/2) * Sin(10) + Sin(10)= 0

Hope it’s helpful........ ☺

Answer 2

Answer:

=0

Step-by-step explanation:

-sin(60+10)+sin(60-10)+sin(10)

=-sin60cos10 -cos60sin10 +sin60cos10-sin10cos60 +sin10

=-2sin10cos60+sin10

=-2(1/2)sin10+sin10

=0