Verify an identity by transforming one side only | Trigonometry Math | Free K12 Practice

TRIG.87 Verify an identity by transforming one side only

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Skill Level🔴 Hard

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Select the valid one-side transformation of the left-hand side: tan x − tan y = sin(x − y) ÷ (cos x cos y) Which option shows a correct equivalent rewrite of the LEFT side?