In mathematics<span>, </span>trigonometric identities<span> are equalities that involve </span>trigonometric functions<span> and are true for every value of the occurring </span>variables<span> where both sides of the equality are defined. Geometrically, these are </span>identities<span> involving certain functions of one or more </span>angles<span>.
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So we know this identity:
Given that α = 20° and β = 4°, the solution is:
Answer:
C. y=4/5x-2
Step-by-step explanation: