Struct ImCosFn 

pub struct ImCosFn;

Returns the cosine of a complex number.

Evaluates complex cosine and returns the result as complex text.

Remarks

• Input is coerced to complex-number text before parsing.
• Uses hyperbolic components for the imaginary part.
• Invalid complex text returns #NUM!.

Examples

title: "Cosine of zero"
formula: "=IMCOS(\"0\")"
expected: "1"

title: "Cosine on imaginary axis"
formula: "=IMCOS(\"i\")"
expected: "1.5430806348152437"

related:
  - IMSIN
  - IMEXP
faq:
  - q: "Why is the imaginary part negated in `IMCOS`?"
    a: "Complex cosine uses `cos(a+bi)=cos(a)cosh(b)-i sin(a)sinh(b)`, so the imaginary term carries a minus sign."

Trait Implementations

impl Debug for ImCosFn

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Function for ImCosFn

[formualizer-docgen:schema:start] Name: IMCOS Type: ImCosFn Min args: 1 Max args: 1 Variadic: false Signature: IMCOS(arg1: any@scalar) Arg schema: arg1{kinds=any,required=true,shape=scalar,by_ref=false,coercion=None,max=None,repeating=None,default=false} Caps: PURE [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

fn name(&self) -> &'static str

fn min_args(&self) -> usize

fn arg_schema(&self) -> &'static [ArgSchema]

fn eval<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

The unified evaluation path.

fn namespace(&self) -> &'static str

fn variadic(&self) -> bool

fn volatile(&self) -> bool

fn aliases(&self) -> &'static [&'static str]

Optional list of additional alias names (case-insensitive) that should resolve to this function. Default: empty slice. Implementors can override to expose legacy names. Returned slice must have ’static lifetime (typically a static array reference).

fn function_salt(&self) -> u64

fn eval_reference<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Option<Result<ReferenceType, ExcelError>>

Optional reference result path. Only called by the interpreter/engine when the callsite expects a reference (e.g., range combinators, by-ref argument positions, or spill sources).

fn dispatch<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

Dispatch to the unified evaluation path with automatic argument validation.