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If θ is an angle in the third quadrant and cscθ=−135, find the value for 13sin2θ – 2cos2θ in the most accurate and proper form.

 Nov 24, 2021
edited by vxnessa  Nov 24, 2021
 #1
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Can't you do ANY of this?  Do you have some ideas?

 Nov 24, 2021

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