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find tangent 15 degree

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find tangent 15 degree

Posted by Rohit Dandyan 6 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Amit Singh 6 years, 4 months ago

Tan 15°= tan( 45°- 30°) ......( We can expand 15° ) = tan 45 - tan 30 _________________ 1+ tan 45 × tan 30 = 1 - 1/under root 3 ___________________ 1+ 1/under root 3 under root 3 - 1 ------------ under root 3 = ----------------------------- under root 3 +1 __________ under root 3 Under root 3 - 1 =_________________ ........ ( Answer) Under root 3 + 1

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