1.

Sin70/cos20 + cosec20/sec70 - 2cos70 - cosec20 =0​

Answer»

ANSWER:

sin70/cos(90-70) +cosec20/sec(90-20)-2cos70/cosec(90-70)

sin70/sin70+cosec20/sec20-2cos70/cos70

1+1-2=0



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