1.

हरि न०८ the identity' (sin O + cos 6) (tan © + cot 6) = sec O + ००४५५ 0(ICSE 2014)W ० तक

Answer»

LHS-(sinA + cosA)(sinA/cosA + cosA/sinA)

​(sinA + cosA)(sin^ + cos^2A/sinAcosA)

sinA + cosA/sinAcosA

​RHS-

1/cosA + 1/sinA=sinA+cosA/sinAcosA=secA+cosecA



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