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If sin alpha/2 + cos alpha/2=1.4, then: ...

If `sin alpha/2 + cos alpha/2=1.4`, then: `sin alpha cos alpha`=

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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-MASTERING THE BEST - ALL TOPICS
  1. If cos(A-B) = 3/5 and tanA.tanB=2, then

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  2. If ABCD is a cyclic quadrilateral, then the value of cosA-cosB+cosC-co...

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  3. If sin alpha/2 + cos alpha/2=1.4, then: sin alpha cos alpha=

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  4. If tan alpha + cot alpha =m, then: tan^(4)alpha +cot^(4)alpha=

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  5. If cos theta+cos phi=a and sin theta - sin phi=b, then: 2cos(theta + p...

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  6. If sin x + "cosec"x=2, then, for all n in N, the value of: sin^(n)x + ...

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  7. If sin^(-1)x= theta +phi and sin^(-1)y = theta - phi, then: 1+xy=

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  8. If tan^(-1)(a/x) + tan^(-1)(b/x) =pi/2, then: x=

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  9. If two angles of a triangle are cot^(-1)2 and cot^(-1)3, then the thir...

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  10. sec^(2)(tan^(-1)2) +"cosec"^(2)(cot^(-1)3)=

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  11. If sin^(-1)x + sin^(-1)y =(2pi)/3, then: cos^(-1)x +cos^(-1)y=

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  12. Find the value of sin^(-1)(cos(sin^(-1)x))+cos^(-1)(sin(cos^(-1)x))

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  13. If sinA+ sin B + sinC=(3sqrt(3))/2, then: triangleABC, is

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  14. If cos^(2)A+cos^(2)B+cos^(2)C=1, then triangle ABC is

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  15. If tan x =b/a, then the value of (a cos 2x+ b sin 2x) is equal to-

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  16. (sin^(2)3A)/(sin^(2)A)-(cos^(2)3A)/(cos^(2)A)=

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  17. If 4 sin^(-1)x + cos^(-1)x=pi, then: x=

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  18. If tan theta(1).tantheta(2)=k, then: (cos(theta(1)-theta(2))/(cos(thet...

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  19. If tan^(-1)3+ tan^(-1)x = tan^(-1)8, then: x=

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  20. Prove that: cot^(-1)((ab+1)/(a-b))+cot^(-1)((bc+1)/(b-c))+cot^(-1)((ca...

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