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Evaluate the following:(iii)Cos45^@/(Sec...

Evaluate the following:(iii)`Cos45^@/(Sec30^@+Cosec30^@)`

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Evaluate the following: (Cosec30^@+Cosec60^@+Cosec90^@)/(Sec0^@+Sec30^@+Sec60^@)

Evaluate the following:(iv) (Sin30^@+tan45^@-Cosec60^@)/(Sec30^@+Cos60^@+Cot45^@)

Evaluate the following:(v) (5cos60^@+4Sec30^@-tan^2 45^@)/(Sin^2 30^@+Cos^2 30^@)

Evaluate the following:(i) sin 60^@ cos30^@+sin 30^@ cos 60^@

Evaluate the following:(ii) 2 tan^@ 45^@+cos^2 30^@-sin^2 60^@

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Without using trigonometric tables, evaIuate the following: sec37^@/(cosec53^@)+2cot15^@cot25^@cot45^@cot75^@cot65^@-3(sin^2 18^@+sin^2 72^@)

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R G PUBLICATION-INTRODUCTION TO TRIGONOMETRY-EXERCISE
  1. Evaluate the following:(i)sin 60^@ cos30^@+sin 30^@ cos 60^@

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  2. Evaluate the following:(ii)2 tan^@ 45^@+cos^2 30^@-sin^2 60^@

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  3. Evaluate the following:(iii)Cos45^@/(Sec30^@+Cosec30^@)

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  4. Evaluate the following:(iv)(Sin30^@+tan45^@-Cosec60^@)/(Sec30^@+Cos60^...

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  5. Evaluate the following:(v)(5cos60^@+4Sec30^@-tan^2 45^@)/(Sin^2 30^@+C...

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  6. Choose the correct option and justify your choice:(i)(2 tan 30^@)/(1+t...

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  7. Choose the correct option and justify your choice:(ii)(1-tan^2 45^@)/(...

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  8. Choose the correct option and justify your choice:(iii)sin 2A=2sin A i...

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  9. Choose the correct option and justify your choice:(iv)(2 tan 30^@)/(1-...

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  10. If tan(A+B)=sqrt3 and tan(A-B)=1/sqrt3:find A and B.

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  11. State whether the following are true or false.Justify your answer:(i)s...

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  12. State whether the following are true or false.Justify your answer:(ii)...

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  13. State whether the following are true or false. Justify your answer:(ii...

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  14. State whether the following are true or false.Justify your answer:(iv)...

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  15. State whether the following are true or false.Justify your answer:(v)c...

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  16. Evaluate:(i)Sin18^@/Cos72^@

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  17. Evaluate:(ii)tan26^@/Cot64^@

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  18. Evaluate:(iii)Cos48^@-Sin42^@

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  19. Evaluate:(iv)Cosec31^@-Sec59^@

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  20. Show that:(i)tan48^@tan23^@tan42^@tan67^@=1

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