find the value of tan 63°×tan27°
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Tan 63° * tan 27°
= tan 63° * cot (90-27)°
= tan 63 * cot 63
since,
tan (90-¢) = cot ¢
Therefore,
= tan 63° * cot63°
= tan 63° * 1/tan 63°
= 1.
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