The sides of triangle are in `A.P.` and the greatet and least angle are `theta and phi` : pr
112 views · Published 12 October 2018 · 6:09 · Indexed 1 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW The sides of triangle are in `A.P.` and the greatet and least angle are `theta and phi` : prove that `4(1-costheta)(1-cosphi)=costheta+cosphi`
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