Show that ` (Sin(n+1)A-sin(n-1)A)/(cos(n+1)A + 2 cosnA+ cos(n-1)A) = tan(A/2)`
3,781 views · Published 11 October 2018 · 3:30 · Indexed 5 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW Show that ` (Sin(n+1)A-sin(n-1)A)/(cos(n+1)A + 2 cosnA+ cos(n-1)A) = tan(A/2)`
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