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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 B ( COMPOUNDS ANGLES )
- cos(n+1) alpha * cos(n-1)alpha + sin (n+1)alpha * sin (n-1) alpha =
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- cos((pi)/(4)+A) cos((pi)/(4) - B) + sin ((pi)/(4) +A) * sin((pi)/4-B)=
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- sec 255^(@)=
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- cos 15^(@) - cos 75^(@)=
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- tan15^(@) + tan 75^(@)=
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- tan 75^(@) - cot 75^@=
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- "cosec" 15^(@) + sec 15^(@) =
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- tan 70^(@) - tan 20^(@)=
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- cos^(2) 45^(@) - sin^(2) 15^(@)=
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- Find the value of cos^(2)52(1^@)/(2) - sin^(2)22 (1^@)/2
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- cos^(2)""((pi)/(4) +x ) - sin^(2) ""((pi)/4- x ) =
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- cos^(2)(""(pi)/(6) + theta ) -sin^(2)""((pi)/(6) - theta ) =
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- The value of ( sin theta )/( sin^(2) (pi//8 + theta //2)-sin^(2)(pi//8...
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- sum(sin (A-B))/(cos A cos B)=
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- sum(sin (A+B) sin (A-B))/(sin^(2)A sin^(2)B)=
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- Evaluate sum(sin (A+B)sin(A-B))/(cos^(2)A cos^(2)B): if non of cos A ,...
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- cos alpha * sin (beta - gamma ) + cos beta * sin ( gamma - alpha ) + c...
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- Find tan 20^(@) + tan40^(@) + sqrt(3)tan20^(@)tan40^(@).
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- tan 75^(@) - tan 30^@ - tan 75^(@) * tan 30^*(@) =
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- The value of (tan 80^@ - tan 10^(@))/( tan 70^(@))
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