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CBSE Class 11-science Answered

1.cot4x(sin5x + sin3x)=cotx(sin5x -sin3x). 2.prove that sin 18degree =square root 5 -1/4 and hence prove cos36 degree =square root 5 + 1/4 using multiple angle formulae. 3. find the general solution of -1greaterb than or equal to k smaller than or equal to 1.
Asked by Subiya Khan | 11 Oct, 2013, 05:38: PM
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Answered by Vimala Ramamurthy | 12 Oct, 2013, 07:36: AM
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