Homework SourseA tan 12 cot 12 B Cot 25 cos 25sin25 A tan 12 cot 12 B C
A. ( tan 12)( cot 12 )
B. Cot 25- cos 25/sin25
A. ( tan 12)( cot 12 )
B. Cot 25- cos 25/sin25
B. Cot 25- cos 25/sin25
Solution
A (tan12)(cot12)=(tan12)(1/(tan12))=1.
since cot x=1/(tanx)
B.cot25-(cos25/sin25)=cot 25-cot 25=0.
since cotx=cosx/sinx.
