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Evaluate : (sec 42^(@))/( cosec 48^(@...

Evaluate :
` (sec 42^(@))/( cosec 48^(@)) + ( 3 tan 50 ^(@))/( cot 40 ^(@)) - ( 2 cos 43 ^(@))/( sin 47^(@)) `

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using trigonometric tables evaluate the following : (cot 30^(@))/(sec 30^(@)) + ("cosec 30"^(@))/(tan 45^(@)) - (2 cos 0^(@))/(sin 30^(@)) + cos^(2) 45^(@)

Find the value of : (i) (tan 45^(@))/("cosec 30"^(@)) + (sec 60^(@))/(cot 45^(@)) - (5 sin 90^(@))/(2 cos 0^(@)) (ii) 3 sin^(2)30^(@) + 2 tan^(2)60^(@) - 5 cot^(2)45

Evaluate: (tan 47^(@))/(cot 43^(@))

Evaluate : 3(sin 72^(@))/(cos 18^(@))-(sec 32^(@))/(cosec 58^(@))

Without using trigonometric tables , evaluate : (i) (sin40^(@))/(cos50^(@))+(3tan50^(@))/(cot40^(@)) (ii) (sec37^(@))/("cosec "53^(@))-(tan20^(@))/(cot70^(@)) (iii) (cos74^(@))/(sin16^(@))+(sin12^(@))/(cos78^(@))-sin18^(@)sec72^(@) (iv) sin35^(@)sec55^(@)+(4sec32^(@))/("cosec "58^(@))

Evaluate : (i) 3 cos 80^(@) "cosec 10"^(@) + 2 sin 59^(@) sec 31^(@) (ii) (cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@)) - 8 sin^(2) 30^(@) (iii) "cosec" (65^(@) + A) - sec(25^(@) - A)

Evaluate cos 40 ^(@) cosec 50 ^(@)+ sin 50 ^(@) sec 40 ^(@)

Evaluate : (i) (cos 55^(@))/(sin 35^(@)) + (cot 35^(@))/(tan 55^(@)) (ii) sin 42^(@) sin 48^(@) - cos 42^(@) cos 48^(@)

Evaluate : (sin 35^(@) cos 55^(@) + cos 35^(@) sin 55^(@))/ (cosec^(2) 10^(@) - tan^(2) 80^(@))

Without using a trigonometric table calculate: 4(sin32^(@))/(cos58^(@))+5(tan48^(@))/(cot42^(@))-8(sec72^(@))/(cosec18^(@))

ICSE-CHAPTERWISE REVISION (STAGE 1) -Trigonometry
  1. If cos A = 4 sin A , find the value of , 4 cos ^(2) A - 3 sin ^(2)...

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  2. If 4 cos ^(2) A -3 =0 and 0^(@) le A le 90 ^(@) find : angla A

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  3. If 4 cos ^(2) A -3 =0 and 0^(@) le A le 90 ^(@) find : cos 3A

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  4. If 4 cos ^(2) A -3 =0 and 0^(@) le A le 90 ^(@) find : tan ^...

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  5. If 2 cos (A-B) = 2 sin ( A+ B) = sqrt3 find the value of acute a...

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  6. If cos A = (9)/(41) , find the value of (1)/(sin ^(2)A ) - cot ^...

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  7. If (2 cos 2A-1) (tan 3A-1)= 0, find all possible values of A

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  8. If tan A =1 and tan b = sqrt3 , evaluate : cos A cos B - sin A sin...

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  9. If tan A =1 and tan b = sqrt3 , evaluate : sin A cos B+ cos A sin...

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  10. Find the value of angle A , if : sin 2A = 1

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  11. Find the value of angle A , if : 2 sin 2A =1

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  12. Find the value of angle A , if : 2 sin A=1

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  13. Using the given figure , find the value of angle A , if : (i) x= y...

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  14. Find the 'x' in each of the following

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  15. In the figures given below , find AB:

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  16. In the given figure angle B = 90 ^(@) and angle ADB = x^(@) , Fin...

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  17. Evaluate : tan 25^(@) tan 65 ^(@) - cot 25^(@) cot 65^(@)

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  18. Evaluate : (sec 42^(@))/( cosec 48^(@)) + ( 3 tan 50 ^(@))/( cot 4...

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  19. In Delta ABC , angle B = 90 ^(@) Evaluate : cosec A cos C - sin ...

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  20. For triangle ABC prove that sec((A+B)/2)="cosec"C/2

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