CBSE Class 11-science Answered
SIMPLIFY:
COS(-a)/sin(90+a)
Asked by swati gaur | 31 May, 2013, 12:57: PM
Expert Answer
Using identities
cos(-x) = cosx
sin(90 + A) = cosA
COS(-a)/sin(90+a) = cos(a)/cosa = 1
Answered by | 02 Jun, 2013, 04:44: PM
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