CBSE Class 11-science Answered
SEC (270 DEGREE-A) SEC (90 DEGREE-A)-(TAN 270 DEGREE-A) TAN (90 DEGREE+A)=?
Asked by Vivek Sehgal | 02 May, 2012, 03:04: PM
Expert Answer
sec (270 -A) sec (90 -A)-(tan 270 -A) tan (90 +A)
= -cosec A cosec A + cot A cot A
= -cosec2A + cot2A = -1
Answered by | 03 May, 2012, 10:22: AM
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