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State which of the following are positiv...

State which of the following are positive ? `cos 315^@`

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`cos 315^@` is +ve as `315^@` lies in 4th quadrant and cos is +ve there.
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MBD PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
  1. State which of the following are positive ? sec 199^@

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  2. State which of the following are positive ? cosec 126^@

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  3. State which of the following are positive ? cos 315^@

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  4. State which of the following are positive ? cot 375^@

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  5. Express the following as trigonometric ratios of some acute angles. s...

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  6. Express the following as trigonometric ratios of some acute angles. t...

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  7. Express the following as trigonometric ratios of some acute angles. s...

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  8. Express the following as trigonometric ratios of some acute angles. c...

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  9. Express the following as trigonometric ratios of some acute angles. ta...

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  10. Express the following as trigonometric ratios of some acute angles. co...

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  11. Express the following as trigonometric ratios of some acute angles. co...

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  12. Express the following as trigonometric ratios of some acute angles.sec...

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  13. Find the domains of tangent and cotangent functions.

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  14. Determine the ranges of sine and cosine functions.

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  15. Find a value of A when cos 2A = sin 3A

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  16. Find the value of cos 1^@, cos 2^@ ….. Cos 100^@

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  17. Find the value of cos 24^@ + cos 5^@ + cos 175^@ + cos 204^@ + cos 300...

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  18. Evaluate tan ((pi)/20).tan((3pi)/20).tan((5pi)/20).tan((7pi)/20).tan((...

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  19. Show that (sin^3(180^@+A).tan(360^@-A)sec^2(180-A))/(cos^2(90^@+A)cose...

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  20. If A = cos^2theta + sin^4theta then prove that for all values of theta...

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