`(sinA-sin5A+sin9A-sin13A)/(cosA-cos5A-cos9A+cos13A)=cot4A`
2,957 views · Published 11 October 2018 · 6:05 · Indexed 2 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW `(sinA-sin5A+sin9A-sin13A)/(cosA-cos5A-cos9A+cos13A)=cot4A`
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