sin^3a+sin^3(60+a)+sin^3(240+a)=3sina-sin3a
Answers
Answered by
1
You have missed the term of 1/4 in right hand side term .
i.e. Multiply the whole right term by 1/4 , then your equation will hold true.
Pre-requiste to understand my answer :
Here, a is in degrees
1) Trigonometry
Formulas
sin (180°+a) = -sin(a)
sin(3a) = 3sin(a)-4sin^3(a).
2) Simple addition and subtraction.
Hope, you understand my writing and it may helps you .
So, Enjoy and Chill out .
Bye
i.e. Multiply the whole right term by 1/4 , then your equation will hold true.
Pre-requiste to understand my answer :
Here, a is in degrees
1) Trigonometry
Formulas
sin (180°+a) = -sin(a)
sin(3a) = 3sin(a)-4sin^3(a).
2) Simple addition and subtraction.
Hope, you understand my writing and it may helps you .
So, Enjoy and Chill out .
Bye
Attachments:
Similar questions