Question

please help Rewrite 2cos 75°sin 75° using a double-angle identity

Answer 1

http://www.efunda.com/math/trig_functions/images/double.gif <--- try using the sine identity

Answer 2

sin 2x=2sin x cos x

Answer 3

so sin 2(75)= 2sin (75) cos (75)

Answer 4

yes

Answer 5

sin150=sin(180-30)=?

Answer 6

\[\sin \left( 180-\theta \right)=\sin \theta\]

Answer 7

thank you

Answer 8

yw