Question

evaluate the following 1) 6 sin20-8 sin cube 20

Answer 1

Answer:

Heya,

The question would be easy if we will use the approach of multiple and submultiples.

we know,

.........(i)

Now,

expression 6 sin20° - 8sin³20° can be written as 2(3sin20° - 4sin³20°).

=> 2(sin3 × 20°) ..........using (i)

=> 2 × sin60°

Rea

Answer 2

Answer:

Refer to the attachment mate