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8*sin(x/8)*cos(x/2)*cos(x/4)*cos(x/8)=...

`8*sin(x/8)*cos(x/2)*cos(x/4)*cos(x/8)=`

A

`8 sin x`

B

`sin x `

C

`cos x `

D

`8 cos x`

Text Solution

Verified by Experts

The correct Answer is:
B
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES -CRITICAL THINKING
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  3. 8*sin(x/8)*cos(x/2)*cos(x/4)*cos(x/8)=

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  4. If x= cos 10^(@)cos 20^(@) cos 40^(@), then the value of x is

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  8. The value of (1)/(sin 10^(@)) -(sqrt3)/(cos 10^(@)) is equal to

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  9. If |tanA|lt1and |A|is acute, then (sqrt(1+sin2A)+sqrt(1-sin2A))/(sqrt...

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  10. If tanx=b/a then sqrt((a+b)/(a-b))+sqrt((a-b)/(a+b))=

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  11. Show that: t a n(60^0+theta)t a n(60^0-theta)=(2cos2theta+1)/(2cos2the...

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  12. Maximum value of sin^4 theta + cos^4 theta is

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  13. Let B =2 sin ^(2) x - cos 2x, then

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  14. If 3 sin 2 theta = 2 sin 3 theta and 0 lt theta lt pi, then sin theta ...

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  15. If sin 2A =sin 3A and 0 le A le 90^(@), then A is equal to

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  16. Solve that following equations : "tantheta"+"tan"(theta+pi/3)+"tan"(t...

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  17. If sin theta =-4/5 and theta lies in third quadrant, then the valu...

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  18. If sec theta =1 (1)/(4), then tan ""(theta)/(2)=

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  19. For for A=133^(@),2cos""A/2is equal to

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  20. If cos theta = 3/5 and cos phi =4/5, where theta and phi are positive ...

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