If tan 40° = a, then tan140-tan130÷
1+tan 140° tan 130
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3
Answer:
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Step-by-step explanation:
by the formula, tan ( A - B ) = tan A - tan B / 1 + tan A tan B
tan 140 - tan 130 / 1 + tan 140 tan 130 = tan (140 - 130)
= tan 10
Answered by
3
Answer:1-A square/2A
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