document.write( "Question 1162249: Find the exact values of sin(2θ), cos(2θ), and tan(2θ) when sin θ =-7/12 and 180∘ < 𝜃 < 270∘. \n" ); document.write( "

Algebra.Com's Answer #786009 by MathTherapy(10556) $\"\"$ $\"About$

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Find the exact values of sin(2θ), cos(2θ), and tan(2θ) when sin θ =-7/12 and 180∘ < 𝜃 < 270∘.
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The other person who responded gave you WRONG answers. The problem asks for EXACT VALUES. What he gave you are NOT exact values!
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document.write( ". We then need to find A, or x, which will be negative, since  is an ∠ in the 3rd quadrant (180∘ < 𝜃 < 270∘).
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document.write( "Therefore, THREE of the 6 TRIG. RATIOS are: 
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document.write( "You may not need tan 𝜃, depending on which formula you use. 
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document.write( "For me, since I would've determined sin 2𝜃 and cos 2𝜃, I would then use the formula: . Then again, you decide!!\r
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document.write( "Below, I've done  for you. Follow that same concept to determine cos 2𝜃 and maybe tan 2𝜃.
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document.write( " ------ Substituting , for, sin 𝜃, and  for cos 𝜃. 
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document.write( "BTW, Edwin, your tan 𝜃 is WRONG!! \n" );
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