Trigonometry: Co-Function Identities
Read this topicExplanations 3
- The cofunction identities state that sin(90∘−x)=cosxcos(90∘−x)=sinxtan(90∘−x)=cotxcot(90∘−x)=tanxsec(90∘−x)=cscxcsc(90∘−x)=secx\begin{align*} \sin (90^{\circ}-x) &= …
By Anthony Jiang
- Cofunction Identities There are six negative angle identities you need to memorize! Negative angle identities Co-function identities (this lesson) Angle and sum differences iden…
By Anusha Rahman
- (Video) Co-Function Identities by Mario's Math Tutoring In this video, Mario's Math Tutoring will help you understand the cofunction identities. Summary We can think of the cofu…
By Anusha Rahman
Problems 3
- (BMT 2016 Analysis Focus #5) Find tan1∘1+tan1∘+tan2∘1+tan2∘+...+tan89∘1+tan89∘.\frac{\tan 1^{\circ}}{1+\tan 1^{\circ}} + \frac{\tan 2^{\circ}}{1+\tan 2^{\circ}} + ... + \f…
- If sin(x)=45\sin (x)= \frac{4}{5}sin(x)=54, then what is cos(90−x)\cos(90-x)cos(90−x)?
- Compute the value of the sum 11+tan30∘+11+tan310∘+11+tan320∘+11+tan330∘+11+tan340∘+11+tan350∘+11+tan360∘+11+tan370∘+11+tan380∘.\begin{align*} \frac{1}{1 + \tan^3 0^\cir…