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tan1 tan11 tan21 tan69 tan79 tan 89 = 1

Posted by Touheed Pathan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Sandhya Sridhar 6 years, 11 months ago

Tan (90-1)tan (90-11) tan (90-21) tan69 tan79 tan89=1 Cot89 cot79 cot69 tan69 tan79 tan89=1 I/ tan89 1/tan79 1/ tan69 tan69 tan 79 tan 89 =1(1/tan=cot) 1=1

2Thank You

Touheed Pathan 6 years, 11 months ago

Solve this problem

4Thank You

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