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ARIHANT MATHS-TRIGONOMETRIC FUNCTIONS AND IDENTITIES-Exercise For Session 9
- If tan(x/2)=cosec x - sin x then the value of tan^2(x/2) is
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- Find the value of cos^4 (pi / 8)
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- Find the value of expression 1 / (cos 290^@) + 1 / (sqrt3 sin 250^@)
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- If x+1/x=2 cos theta, then the value of x^n+1/x^n
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- Prove that sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=cos7^(@).
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- If alpha and beta are the solution of a cos theta + b sin theta = c...
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- If sinalpha+sinbeta=a and cosalpha+cosbeta=b , prove that tan(alpha-be...
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- Show that cot (142\ 1/2) ^@ = sqrt(2) + sqrt(3) - 2 - sqrt(6)
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- If costheta=(cosalpha+cosbeta)/(1+cosalphacosbeta),\ prove that tanth...
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- Find the value tan (pi/5)+2tan((2pi)/5)+4cot((4pi)/5).
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