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Prove that: 2sin^2(pi/6)+cosec^2((7pi)/6...

Prove that: `2sin^2(pi/6)+cosec^2((7pi)/6)cos^2(pi/3)=3/2`

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2sin^2(pi/6 )+c o s e c^2((7pi)/6)cos^2(pi/3)=3/2

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Prove that: sin^2(pi/6)+cos^2(pi/3)-t a n^2pi/4=-1/2

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RD SHARMA ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. Prove that: sin^2(pi/6)+cos^2(pi/3)-t a n^2pi/4=-1/2

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  2. cot^2 pi/6 +cose c (5pi)/6 +3tan^2 pi/6=6

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  3. Prove that: 2sin^2(pi/6)+cosec^2((7pi)/6)cos^2(pi/3)=3/2

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  4. Find all other trigonometrical ratios if sintheta=-(2sqrt(6))/5 andth...

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  5. Find sinthetaa n dt a nthetaifcostheta=-(12)/(13)andtheta lies in the ...

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  6. If (sinA)/(sinB)=pa n d(cosA)/(cosB)=q , find tanAa n dtanBdot

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  7. If 10sin^4alpha+15cos^4alpha=6 , find the value of 27cos e c^6alpha+8s...

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  8. If a=s e ctheta-t a ntheta and b=cos e ctheta+cottheta , then show tha...

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  9. A solid sphere of radius R/2 is cut out of a solid sphere of radius R ...

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  10. If Tn=sin^ntheta+cos^ntheta , prove that (i) (T3-T5)/(T1)=(T5-T7)/(T...

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  11. Prove that: sqrt((1-sintheta)/(1+s intheta))+sqrt((1+sintheta)/(1-s in...

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  12. If sectheta+tantheta=p , obtain the values of sectheta,tantheta and s...

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  13. If acos theta-b sin theta=c , show that asin theta+b cos theta=+-sqrt(...

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  14. If t a ntheta+sintheta=m and tantheta-sintheta=n , show m^(2)-n^2=4sqr...

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  15. Prove that: s e c^2theta+cos e c^2thetageq4 .

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  16. Given that: (1+cosalpha)(1+cosbeta)(1+cosgamma)=(1-cosalpha)(1-cosbeta...

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  17. Prove that: 3(sintheta-costheta)^4+6(sintheta+costheta)^2+4(sin^6theta...

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  18. Prove that: 2s e c^2theta-s e c^4theta-2cos e c^2theta+cos e c^4theta=...

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  19. If A lies in second quadrant and 3tanA+4=0, then the value of 2cotA-5c...

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  20. Is the following inequality correct? sin1^0> sin1

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