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Q
Evaluate : tan1° tan2° tan3° tan4°………… tan87° tan88° tan89°
Solution
tan1° tan2° tan3° tan4°………… tan87° tan88° tan89°
This expression consists of 89 terms
tan(90° − x°) = cotx°
tanx° cotx° = 1
tan89° = tan(90° − 1°) = cot1°
and tan1° cot1° = 1
tan88° =...
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Solution
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Keynote
tan(90° − x°) = cotx°
tanx° cotx° = 1
tan45° = 1
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