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Find the sign of the values of tan113^0-...

Find the sign of the values of `tan113^0-cos107^0=a` and `tan107^0-cos105^0=b`

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`a=tan113^@-cos107^@`
`=cos73^@-tan67^@ltcos73^@-tan45^@lt0`
`b=tan107^@-cos105^@`
`=cos75^@-tan73^@ltcos75^@-tan45^@lt0`
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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS -SINGLE CORRECT ANSWER TYPE
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