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Dear student,please post your questions separately.v3 cosec20 – sec 20 v3/sin20-1/cos20 =[v3cos20-sin20]/[sin20cos20] =2[v3/2.cos20 -1/2 sin20]/sin 20cos20 =2[cos30.cos20-sin30.sin20]/sin20cos20 =2[cos(20+30)]/[sin20cos20] =2os50/sin20cos20 =4cos50/2sin20cos20 =4cos50/sin40 =4cos(90-40)/sin40 =4sin40/sin40 =4Thanks & RegardsRinkoo GuptaAskIITians Faculty
Dear student,
please post your questions separately.
v3 cosec20 – sec 20
v3/sin20-1/cos20
=[v3cos20-sin20]/[sin20cos20]
=2[v3/2.cos20 -1/2 sin20]/sin 20cos20
=2[cos30.cos20-sin30.sin20]/sin20cos20
=2[cos(20+30)]/[sin20cos20]
=2os50/sin20cos20
=4cos50/2sin20cos20
=4cos50/sin40
=4cos(90-40)/sin40
=4sin40/sin40
=4
Thanks & Regards
Rinkoo Gupta
AskIITians Faculty
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