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OpenStudy (anonymous):
cos 3 theta = 4 cos^3 theta - 3 cos theta
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OpenStudy (anonymous):
formula is ryt.. wht are u asking?
mathslover (mathslover):
@nurhasana Please specify the question ... What are you asking for? So that we can help you accordingly. By the way @nurhasana : \[\large{\color{red}{\textbf{WELCOME TO OPENSTUDY}}}\]
OpenStudy (anonymous):
i think to need to Prove ryt ?
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