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Prove that cosAsin(B-C)+cosBsin(C-A)+cos...

Prove that `cosAsin(B-C)+cosBsin(C-A)+cosCsin(A-B)=0`

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A N EXCEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
  1. Prove that sin105^@+cos105^@=cos45^@

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  2. Choose the correct answer from the bracket and fill in the blank sin(B...

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  3. Prove that cosAsin(B-C)+cosBsin(C-A)+cosCsin(A-B)=0

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  4. A wheel is rotated pi/2 radians. Convert the angle of rotation into de...

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  5. A wheel is rotated pi/2 radians. Convert the angle of rotation into de...

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  6. Evaluate the following tan((13pi)/3)

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  7. Given that sinx+siny=a and cosx+cosy=b rajan derived the value of tan(...

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  8. Prove that cotA-tanA=2cotA

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  9. using cotA-tanA=2cot2A deduce that tanalpha+tan2 alpha+4tan4alpha+8co...

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  10. What is the value of tan30^@+2tan60^@+4tan120^@+8cot240^@? Also verify...

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  11. Match the following:

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  12. Prove that tan^2 60^@+4cos^2 45^@+3sec^2 30^@+5cos^2 90^@=9

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  13. Suppose theta is an acute angle and tantheta+cot theta=2 Derive a quad...

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  14. Suppose theta is an acute angle and tantheta+cot theta=2 solve the gi...

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  15. Suppose A and B are angles lying in the first quadrant such that tanA=...

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  16. Suppose A and B are angles lying in the first quadrant such that tanA=...

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  17. Suppose A and B are angles lying in the first quadrant such that tanA=...

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  18. Which of the following are true if theta is in first quadrant tantheta...

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  19. Which of the following are true If theta is in 3rd quadrant sintheta=1...

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  20. Which of the following are true? for some angle theta: sintheta=4

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