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OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
- sin65^(@)+sin43^(@)-sin29^(@)-sin7^(@) is equal to
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- If sec alpha and cosec alpha are the roots of the equation x^(2)-ax+b=...
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- The value of the expression 3(sinx-cosx)^(4)+4(sin^(6)x+cos^(6)x)+6(s...
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- If cos(alpha+beta)sin(gamma+delta)=cos(alpha-beta)sin(gamma-delta) the...
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- sin^(2)5^@+sin^(2)10^@+sin^(2)15^@ +.......+sin^(2)85^@ + sin^(2)90^@=
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- If sinx+sin^2x=1, then find the value of cos^(12)x +3cos^(10)x + 3 cos...
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- If ABCD is a cyclic quadrilateral, then the value of cosA-cosB+cosC-co...
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- If ABCD, is a cycling quadrilateral such that tanA-5=0and 5cosB+3=0, t...
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- If sin (picot theta)=cos (pi tantheta), then
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- The value of sinx siny sin(x-y)+sinysinz sin(y-z) +sinz sinx sin(z-x)+...
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- If ABCD is a convex quadrilateral such that 4 sec A+5 =0 then the quad...
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- If (tanalpha+tanbeta)/(cot alpha+cot beta)+{cos(alpha-beta)+1}^(-1)=1,...
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- cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi...
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- The value of cos12^(@)cos24^(@)cos36^(@)cos48^(@)cos72^(@)cos84^(@), i...
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- The value of sin""(15pi)/(32)sin""(7pi)/(16)sin""(3pi)/(8), is
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- sum(r=1)^(n-1)cos^(2)""(rpi)/(n) is equal to
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- The value of cot theta-tantheta-2tan2theta-4tan4theta-8cot8theta, is
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- If cos(x-y), cosx and cos(x+y) are in H.P., then cos x sec (y/2) equal...
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- The value of tan20^(@)+2 tan50^(@)-tan70^(@), is
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- If cosA+cosB+cosC=0, then cos3A+cos3B+cos3C is equal to
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