Question

What is the value of sin 10° + sin 50° - sin 70°?​

Answer 1

Answer:

The value of sin 10° + sin 50° - sin 70° is 0.​

Step-by-step explanation:

sin 10° + sin 50° - sin 70°

Sin A - sin B $= 2cos \frac{A+B}{2}sin \frac{A-B}{2}$

sin 50° - sin 70° $= 2cos \frac{50 + 70}{2}sin \frac{50-70}{2} = - sin 10$

So, sin 10° + sin 50° - sin 70°

= sin 10° - sin 10°

= 0