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Calculate the value of following :- (a...

Calculate the value of following :-
`(a)cos75^(@)"",(b)sin15^(@)`

Text Solution

Verified by Experts

The correct Answer is:
(a) `cos 75^(@)=(sqrt(3)-1)/(2sqrt(2))` (b) sin `15^(@)=(sqrt(3)-1)/(2sqrt(2))`
(c ) `sin 75^(@)=(sqrt(3)+1)/(2sqrt(2))`
`(d) cos 105^(@)=-((sqrt(3)-1)/(2sqrt(2))) " or "(1-sqrt(3))/(2sqrt(2))`
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ALLEN -RACE-Basic Maths (Trigonometry)
  1. Find the value of following :- {:((a)sin 150^(@)"", (b)sin 135^(@)),...

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  2. Find the value of the following :- (a)sin((pi)/(6)),(b)cos ((pi)/(4)...

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  3. Find the values of the following :- (a)sin(2pi+(pi)/(6)),(b)cos(2pi+...

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  4. Find the values of the following :- {:((a)sin(-30^(@)),(b)cos(-45^(@...

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  5. Find the values of all the the T-Rations if :- (a) cos theta =(7)/(2...

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  6. Calculate the value of following :- (a)cos75^(@)"",(b)sin15^(@)

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  7. find the values of followingP (a)sin75^(@)"",(b)cos105^(@)

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  8. Assertion:- For a very small angle theta ,sinthetaapproxtheta. Reaso...

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  9. What is value of expression 2(sin15^(@)+sin75^(@))^(2)?

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  10. Find the value of 5(sin100^(@)cos27^(@)+sin27^(@)cos100^(@)).

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  11. What is value of expression 4(sin15^(@)+sin75^(@))^(2)?

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  14. If tantheta=(24)/(7) and sintheta is negative then value of costheta w...

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  15. Suggest suitable match between fuction given in the first column and i...

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  16. Depending on in which quadrant an angle theta lies, functions costheta...

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