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MAHAVEER PUBLICATION-TRIGONOMETRIC RATIOS-QUESTION BANK
- Show that cos(60^@-A) cos(30^@-B)-sin(60^@-A)sin(30^@-B)=sin(A+B)
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- Find tha value of tan 4620^@
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- Find tha value of cos(-1575^@)
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- Find the value of cos((19pi)/3)
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- Prove that(sinA + sinB)/(cosA + cosB)= tan((A+B)/2)
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- Prove that (sin5A-sin3A)/(cos5A+cos3A)=tan A
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- Prove that (sin2A+sin5A-sin A)/(cos2A+cos5A+cos A)=tan2A
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- If A+B+C=180^@ prove that sin A+sin B+sin C=4 "cos" A/2 "cos" B/2 "cos...
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- If A+B+C=pi and cos A= cos B.cos C prove that tan A= tan B+ tan C
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- Prove that sin A + cos A= sqrt2 cos (45^@-A)
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- Prove that tan27^@+tan 18^@+tan27^@.tan18^@=1.
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- Prove that cos130^@+cos110^@+cos10^@=0.
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- secx=2/sqrt(2+(sqrt(2+2cos4x)))
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- Prove that 2 "cos" pi/16=sqrt(2+sqrt(2+sqrt2))
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- Express sin80^@-cos 70^@ as product.
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- Prove that cos 20^@ cos 40^@ cos60^@ cos80^@=1/16
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- sin2 0^@sin4 0^@sin6 0^@sin8 0^@
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- Prove that cos^6 theta-sin^6theta=cos2theta(1-1/4 sin^2 2 theta)
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- Evaluate tan15^@
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- Find the value of sin18^@
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