Question

evaluate with steps.prove that sin10sin15sin60sin70=√3/16.......pls help me brainlies​

Answer 1

Answer:

Step-by-step explanation:

=sin 60.sin10.sin50.sin70 

= [(√3)/2]sin10sin50sin70 

= [(√3)/2]sin10(cos(-20) - cos120)/2 

= [(√3)/2]sin10(cos20 - cos120)/2 

= [(√3)/2](sin10cos20 - sin10cos120)/2 

= [(√3)/2](sin30 + sin(-10) - 2sin10cos120)/4 

= [(√3)/2](sin30 + sin(-10) + sin10)/4 

= [(√3)/2](1/2)/4 

= (√3)/16 

add this answer to the brainliest one