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sin (50^(@)+theta)-cos (40^(@) - theta)=...

`sin (50^(@)+theta)-cos (40^(@) - theta)=` _______

A

1

B

`-1`

C

2

D

0

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • (sin theta-2 sin^(3) theta)/(2 cos^(3) theta - cos theta) = _______

    A
    `(sin^(2) theta)/(cos theta)`
    B
    `tan theta`
    C
    `(cos^(2) theta)/(sin theta)`
    D
    `cot theta)`

  • sin theta cos (90^(@) - theta) + cos theta sin ( 90^(@)-0)= ________

    A
    0
    B
    1
    C
    2
    D
    `3/2`

  • (sin theta)/(1+cos theta)+(sin theta)/(1-cos theta)= _______

    A
    `2 sin theta`
    B
    `2 cos theta`
    C
    ` 2 sec q`
    D
    `2 cosec theta`

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