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If sinx=cosy, then x+y=45^(@), write tru...

If `sinx=cosy`, then `x+y=45^(@)`, write true or false.

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ICSE-TRIGONOMETRICAL RATIOS OF STANDARD ANGLES-EXERCISE 23(A)
  1. If tantheta=cottheta" and "0^(@) le theta le 90^(@), state the value o...

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  2. If sinx=cosy, write the relation between x and y, if both the angles x...

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  3. If sinx=cosy, then x+y=45^(@), write true or false.

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  4. sectheta.cottheta=cosectheta, write true or false.

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  5. For any angle theta, state the value of : " "sin^(2)theta+cos...

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  6. State for any acute angle theta whether : sintheta increases or decr...

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  7. State for any acute angle theta whether : costheta increases or decr...

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  8. State for any acute angle theta whether : tantheta increases or decr...

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  9. If sqrt(3)=1*732, find (correct to two decimal places) the value of th...

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  10. Evaluate : (cos3A-3cos4A)/(sin3A+2sin4A)," when "A=15^(@).

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  11. Evaluate : (3sin3B+2cos(2B+5^(@)))/(2cos3B-sin(2B-10^(@))), when B...

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  12. Find the value of : sin30^(@)cos30^(@)

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  13. Find the value of : tan30^(@)tan60^(@)

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  14. Find the value of : cos^(2)60^(@)+sin^(2)30^(@)

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  15. Find the value of : cosec^(2)60^(@)-tan^(2)30^(@)

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  16. Find the value of : sin^(2)30^(@)+cos^(2)30^(@)+cot^(2)45^(@)

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  17. Find the value of : cos^(2)60^(@)+sec^(2)30^(@)+tan^(2)45^(@)

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  18. Find the value of : tan^(2)30^(@)+tan^(2)45^(@)+tan^(2)60^(@)

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  19. Find the value of : (tan45^(@))/(cosec30^(@))+(sec60^(@))/(cot45^(@)...

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  20. Find the value of : 3sin^(2)30^(@)+2tan^(2)60^(@)-5cos^(2)45^(@)

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