Express 2 cos 54 . sin 66 as sum or difference of trigonometric ratios
Answers
Answered by
33
Step-by-step explanation:
2 cos 54 . sin 66
=sin (66+54)+sin(66-54)
=sin 120 + sin 12
=√3/2+ sin12
Answered by
15
Step-by-step explanation:
2cos54°sin66°
it's in the form of 2cosAsinB
sin(A+B)-sin(A-B)
sin(54°+66°)-sin(54°-66°)
sin120°-sin(-12°)
sin120°+sin12°
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