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15 tan A =14 find 2sin …

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15 tan A =14 find 2sin A cos A /cos square A - sin square A

Posted by Sanjay Bhatt 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 2 months ago

15tanA=14

tanA =14/15

tan2A=2tan2A/1-tan²A

=2*(14/15)/(1-225/196)

tan2A=28/15/29/225=420/29

=======================================

Now 2sinAcosA/cos²A-sin²A

=sin2A/cosA=tan2A

=420/29

0Thank You

ANSWER

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CBSE > Class 10 > Mathematics