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The total number of solution of cosx=sqr...

The total number of solution of `cosx=sqrt(1-sin2x)` in `[0,2pi]` is equal to (a) 2 (b) 3 (c) 5 (d) none of these

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. Let us consider the equation cos^4x/a+sin^4x/b=1/(a+b),x in[0,pi/2],a,...

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  2. If tanA=(1-cosB)/(sinB) , then tan2A=tanBdot

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  3. The total number of solution of cosx=sqrt(1-sin2x) in [0,2pi] is equal...

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  4. In Triangle A B C with fixed length of B C , the internal bisector of...

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  5. Four numbers n1,n2,n3a n dn4 are given as n1=sin15^0-cos15^0,n2=cos93^...

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  6. If sin^3xcos3x+cos^3xsin3x=3/8, then the value of 8sin4x is

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  7. The equation sin^4x+cos^4x+sin2x+alpha=0 is solvable for -5/2lt=alphal...

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  8. In triangle A B C , if r1=2r2=3r3, then a : b is equal to 5/4 (b) 4/5...

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  9. If cosalpha=1/2(x+1/x)a n dcosbeta=1/2(y+1/y),(x y >0); x , y ,alpha,b...

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  10. In triangle A B C ,(sinA+sinB+sinC)/(sinA+sinB-sinC) is equal to

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  11. The radii r1,r2,r3 of enscribed circles of triangle ABC are in HP . If...

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  12. Let alphaa n dbeta be any two positive values of x for which 2cosx ,|c...

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  13. If (y+3)/(2y+5)=sin^2x+2cosx+1, then the value of y lies in the interv...

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  14. If alpha+beta+gamma=2pi, then (a) tan(alpha/2)+tan(beta/2)+tan(gamma...

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  15. The total number of solution of |cotx|=cotx+1/(sinx),x in [0,3pi] , is...

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  16. The value of f(alpha)=sqrt(cos e c^2alpha-2cotalpha)+sqrt(cos e c^2alp...

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  17. If I is the incenter of a triangle ABC, then the ratio I A : I B : I C...

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  18. If asinx+bcos(x+theta)+bcos(x-theta)=d , then the minimum value of |c...

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  20. Let the incircle with center I of A B C touch sides BC, CA and AB at ...

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