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Grade: 11 
        
Please solve below ques
5 years ago

Answers : (1)

View Solution
Rinkoo Gupta
askIITians Faculty
80 Points 
							
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
5 years ago
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