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Cos9A = sinA find the value …

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Cos9A = sinA find the value of tan5A

Posted by Shrija Singh?? 6 years ago

CBSE > Class 10 > Mathematics

2 answers

Ashish Nainwal 6 years ago

It is so easy for me

Aadya Singh ? 6 years ago

Cos9A = sinA => cos9A = cos(90 - A) => 9A = (90-A) => 10A =90 => A = 9. So, tan5A = tan 5×9 = tan45 = 1.

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