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Open Watcom FORTRAN 77 Language Reference

Open Watcom FORTRAN 77 Language Reference

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Functions and Subroutines<br />

12.3.30 Tangent<br />

Definition:<br />

Name:<br />

TAN (generic)<br />

TAN<br />

DTAN<br />

Notes:<br />

tan(a)<br />

Usage:<br />

R ←TAN(R), D ←TAN(D)<br />

R ←TAN(R)<br />

D ←DTAN(D)<br />

All angles are assumed to be in radians.<br />

12.3.31 Cotangent<br />

Definition:<br />

Name:<br />

cotan(a)<br />

Usage:<br />

COTAN (generic) † R ←COTAN(R), D ←COTAN(D)<br />

COTAN R ←COTAN(R) †<br />

DCOTAN D ←DCOTAN(D) †<br />

Notes:<br />

All angles are assumed to be in radians.<br />

† is an extension to <strong>FORTRAN</strong> <strong>77</strong>.<br />

12.3.32 Arcsine<br />

Definition:<br />

Name:<br />

ASIN (generic)<br />

ASIN<br />

DASIN<br />

Notes:<br />

arcsin(a)<br />

Usage:<br />

R ←ASIN(R), D ←ASIN(D)<br />

R ←ASIN(R)<br />

D ←DASIN(D)<br />

The absolute value of the argument of ASIN and DASIN must be

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