What is sin(-90 degrees)?

Consider that -90° corresponds to 270° (the minus sign is to turn clockwise instead of counter-clockwise): so: sin(-90°)=sin(270°)=-1

Tan 90 Degrees: Value of tan 90 with Proof, Examples and FAQ - mydomain

Malia tried to prove that cos pheta = sin 90 degrees - pheta using the following diagram. her proof is not

View question - Why is the sine of 90 degrees equal to 1?

Trigonometric ratios for 90 degrees

sin 90 Degrees Equals 1 Why?

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What is the value of sin 90? - Quora

Sin 90 Degrees I Formula and its Derivation I Sample Examples

trigonometry - How would a triangle for sin 90 degree look - Mathematics Stack Exchange

Sin 90 Degrees - Find Value of Sin 90 Degrees

functions - Trouble understanding sine, cosine of angles greater than $90$ degrees - Mathematics Stack Exchange

SOLUTION: We are having a hard time understanding why the Arcsin (-1) is -90 degrees. We know that the reference triangle is a 45,45,90 degree triangle. Sin is opp/adj so this makes

Trigonometrical Ratios of (90° - θ)

Solved] Use the image below to answer the following question. What

Constructing a 90°, 45° or 22.5° Angle

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