Prove that the trigonometric problem tan9°×tan99°=−1
Prove that the trigonometric problem
tan9°×tan99°=−1
Chandru , 7 Years ago
Grade 11
Trigonometry> Prove that the trigonometric problem tan9...
1 Answers
Arun
Dear student
tan 99 = tan (90 + 9) = – cot9
hence
tan 9 * – cot 9 = – 1
Regards
Arun (askIITians forum expert)
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