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Prove that : sec (70^(@) - 0) = cosec ...

Prove that :
`sec (70^(@) - 0) = cosec (20^(@) + 0)`

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ICSE-CHAPTERWISE REVISION (STAGE 3) -TRIGONOMETRY
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  3. ABCD is an isosceles trapezium with AB parallel to DC, AD = BC = 12 cm...

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  4. If A,B,C are angles of a triangle, prove that "tan "(B+C)/(2)="cot"...

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  5. If A + B = 90 ^(@) , show that : cos A = sqrt(( cos A)/(sin B) -...

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  6. Prove that : tan (55^(@) + x) = cot (35^(@) - x)

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  7. Prove that : sec (70^(@) - 0) = cosec (20^(@) + 0)

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  8. Prove that : Sin( 28 ^(@) +A) = cos ( 62 ^(@) - A)

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  9. Prove that : (sinthetacos(90^0-theta)costheta)/(sin(90^0-theta))+(cost...

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  10. If tan2theta=cot(theta+6^@) , where 2theta and theta+6^@ are acute a...

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  11. If in Delta ABC , angle C = 90 ^(@) , prove that : sqrt((1-sin A)...

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  12. Solve for theta (0^(@) lt theta lt 90 ^(@)) 2 sin ^(2) theta = (...

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  13. Solve for theta ( 0 ^(@) lt theta lt 90^(@)) 2 cos 3 theta= 1

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  14. If cosec theta = sqrt2 , find the value of : (1)/(tan A ) +( sin ...

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  15. If 2 cos theta = sqrt3. prove that : 3 sin theta - 4 sin ^(3) thet...

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  16. Given A is an acute angle and 13 sin A = 5 , evaluate : ( 5 sin A...

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  17. Prove that cos 30 ^(@) = (sqrt3)/(2)

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  18. If sin theta = cos theta find the value of : 3 tan ^(2) theta+ 2 si...

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  19. IF cos B = (3)/(sqrt(13)) and A + B = 90 ^(@) find the value of s...

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  20. Two opposite angles of a rhombus are 60° each. If the length of each s...

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