How to find the value of tan-135°?

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Lilly Maldonado · Accepted Answer

Determine the trigonometric ratio&#039;s value at the specified angle:Let x be the value of tan-135°.∴x=tan-135°      =-tan135°                                        [∵tan-a=-tana]      =-tan1×90°+45                                             =-sin90°+45°cos90°+45°                           [∵tanθ=sinθcosθ]       =-cos45°-sin45°                                   [∵sin90°+a°=cosa°;cos90°+a°=-sina°]       =1212                                                   [∵sin45°=12;cos45°=12]       =1                                                                             Hence, the value of tan(-135°) is 1.

How to find the value of tan-135°?

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