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RS AGGARWAL-T-RATIOS OF SOME PARTICULAR ANGLES-Exercise 11
- Find the value of sin60^(@)cos30^(@)+cos60^(@)sin30^(@).
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- Evaluate each of the following : cos60^(@)cos30^(@)-sin60^(@)sin30^(...
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- Evaluate cos45^(@)cos30^(@)+sin45^(@)sin30^(@).
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- (sin30^(@))/(cos45^(@))+(cot45^(@))/(sec60^(@))-(sin60^(@))/(tan45^(@)...
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- (5cos^2 6 0^(@)+4sec^2 3 0^(@)-tan^2 4 5^(@))/(sin^2 3 0^(@)+cos^2 3 0...
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- Evaluate each of the following : 2cos^(2)60^(@)+3sin^(2)45^(@)-3sin^...
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- cot^(2)30^@-2cos^(2)30^@-(3)/(4)sec^(2)45^@+(1)/(4)csc^(2)30^@
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- Evaluate each of the following : (sin^(2)+30^(@)+4cot^(2)45^(@)-sec^...
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- Evaluate each of the following : (4)/(cot^(2)30)+(1)/(sin^(2)30^(@))...
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- Show that : (i) (1-sin60^(@))/(cos60^(@))=(tan60^(@)-1)/(tan60^(@)+1...
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- Verify each of the following : (i) sin60^(@)cos30^(@)-cos60^(@)sin30...
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- If A=45^(@), verify that (i) sin2A=2sinAcosA (ii) cos2A=2cos^(2)A-1=...
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- If A=30^(@), verify that (i) sin2A=(2tanA)/(1+tan^(2)A) (ii) cos2A=(...
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- If A=60^(@) and B=30^(@), verify that : (i)sin(A+B)=sinAcosB+cosAsin...
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- If A=60^(@) and B=30^(@), verify that : (i)sin(A-B)=sinAcosB-cosAsin...
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- If A and B are acute angles such that tanA=(1)/(3), tanB=(1)/(2) and t...
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- Using the formula, tan 2A = (2tanA)/(1-tan^2A), find the value of tan...
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- Using the formula cos A =sqrt((1+cos2A)/(2)), find the value of cos30^...
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- Using the formula, sinA=sqrt((1-cos2A)/(2)), find the value of sin30^(...
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- In the adjoining figure, DeltaABC is a right-angled triangle in which ...
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