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Evaluate : (sin70^@)/(cos 20^@)+(cosec36...

Evaluate : `(sin70^@)/(cos 20^@)+(cosec36^@)/(sec54^@)-(2cos43^@cosec47^@)/(tan10^@tan40^@tan50^@tan80^@` .

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Without using Trigonometric Tables evaluate the following :- (2sin68^@)/(cos22^@)-(2cot15^@)/(5tan75^@)-(3tan45^@tan20^@tan40^@tan70^@tan50^@)/5 .

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Without using Trigonometric Tables evaluate the following :- (2cos67^@)/(sin23^@)-(tan40^@)/(cot50^@)-cos0^@+tan15^@tan25^@tan60^@tan65^@tan75^@ .

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MBD-INTRODUCTION TO TRIGONOMETRY-EXERCISE
  1. Without using Trigonometric Tables evaluate the following :- (1/2sec^2...

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  2. Without using Trigonometric Tables evaluate the following :- (2sin68^@...

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  3. Evaluate : (sin70^@)/(cos 20^@)+(cosec36^@)/(sec54^@)-(2cos43^@cosec47...

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  4. Without using Trigonometric Tables evaluate the following :- (sin^2 35...

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  5. Without using Trigonometric Tables evaluate the following :- (sin^2 35...

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  6. Without using Trigonometric Tables evaluate the following :- (sec^2 5...

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  7. Without using Trigonometric Tables evaluate the following :- sec^2 10...

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  8. Without using Trigonometric Tables evaluate the following :- (sec^2(90...

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  9. If sin 3theta = cos (theta-6^@) where 3theta and theta-6^@ are acute...

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  10. If sin A = cos B, both A and B are acute angles, find A + B.

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  11. If cosec 2A = sec (A + 6^@) where 2A and A + 6^@ are acute angles find...

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  12. If sin 5theta = cos 4theta where 5theta and 4theta are acute angles, f...

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  13. If tan 2theta = cot 4theta where 2theta and 4theta are acute angles. F...

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  14. If cos 3theta= sin (theta - 6^@) where 3theta and theta-6^@ are acute ...

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  15. If A, B, C are interior angles of triangleABC, prove that :- sin((A+C)...

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  16. If A, B, C are interior angles of triangleABC, prove that :- cos((B+C)...

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  17. If A, B, C are interior angles of triangleABC, prove that :- cos^2(A/2...

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  18. If A, B, C are interior angles of triangleABC, prove that :- 1+tan^2((...

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  19. If A, B, C are interior angles of triangleABC, prove that :- 1+cot^2((...

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  20. If A, B, C are interior angles of triangleABC, prove that :- tan((A+B...

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